mutiples fix for _Generic

* check that _Generic don't match unsigned char * with char *
  this case is usefull as with -funsigned-char, 'char *' are unsigned

* change VT_LONG so it's now a qualifier

  VT_LONG are never use for code generation, but only durring parsing state,
  in _Generic we need to be able to make diference between
  'long' and 'long long'
  So VT_LONG is now use as a type qualifier, it's old behaviour is still
  here, but we can keep trace of what was a long and what wasn't

* add TOK_CLONG and TOK_CULONG

  tcc was directly converting value like '7171L' into TOK_CLLONG or
  TOK_CINT depending of the machine architecture.

  because of that, we was unable to make diference between a long and a
  long long, which doesn't work with _Generic.

  So now 7171L is a TOK_CLONG, and we can handle _Generic properly

* check that _Generic can make diference between long and long long

* uncomment "type match twice" as it should now pass tests on any platforms

* add inside_generic global

  the point of this variable is to use VT_LONG in comparaison only
  when we are evaluating a _Generic.
  problem is with my lastest patchs tcc can now make the diference between
  a 'long long' and a 'long', but in 64 bit stddef.h typedef uint64_t as
  typedef signed long long int int64_t and stdint.h as unsigned long int, so tcc
  break when stdint.h and stddef.h are include together.

  Another solution woud be to modifie include/stddef.h so it define uint64_t as
  unsigned long int when processor is 64 bit, but this could break some
  legacy code, so for now, VT_LONG are use only inside generc.

* check that _Generic parse first argument correctly

* check that _Generic evaluate correctly exresion like "f() / 2"

tccpp.c

@@ -480,6 +480,8 @@ ST_FUNC const char *get_tok_str(int v, CValue *cv)
     switch(v) {
     case TOK_CINT:
     case TOK_CUINT:
+    case TOK_CLONG:
+    case TOK_CULONG:
     case TOK_CLLONG:
     case TOK_CULLONG:
         /* XXX: not quite exact, but only useful for testing  */
@@ -1014,6 +1016,10 @@ static inline int tok_size(const int *p)
     case TOK_LCHAR:
     case TOK_CFLOAT:
     case TOK_LINENUM:
+#ifndef TCC_LONG_ARE_64_BIT
+    case TOK_CLONG;
+    case TOK_CULONG;
+#endif
         return 1 + 1;
     case TOK_STR:
     case TOK_LSTR:
@@ -1023,6 +1029,10 @@ static inline int tok_size(const int *p)
     case TOK_CDOUBLE:
     case TOK_CLLONG:
     case TOK_CULLONG:
+#ifdef TCC_LONG_ARE_64_BIT
+    case TOK_CLONG;
+    case TOK_CULONG;
+#endif
         return 1 + 2;
     case TOK_CLDOUBLE:
         return 1 + LDOUBLE_SIZE / 4;
@@ -1138,6 +1148,10 @@ static void tok_str_add2(TokenString *s, int t, CValue *cv)
     case TOK_LCHAR:
     case TOK_CFLOAT:
     case TOK_LINENUM:
+#ifndef TCC_LONG_ARE_64_BIT
+    case TOK_CLONG:
+    case TOK_CULONG:
+#endif
         str[len++] = cv->tab[0];
         break;
     case TOK_PPNUM:
@@ -1158,6 +1172,10 @@ static void tok_str_add2(TokenString *s, int t, CValue *cv)
     case TOK_CDOUBLE:
     case TOK_CLLONG:
     case TOK_CULLONG:
+#ifdef TCC_LONG_ARE_64_BIT
+    case TOK_CLONG:
+    case TOK_CULONG:
+#endif
 #if LDOUBLE_SIZE == 8
     case TOK_CLDOUBLE:
 #endif
@@ -1213,6 +1231,10 @@ static inline void TOK_GET(int *t, const int **pp, CValue *cv)
     case TOK_CCHAR:
     case TOK_LCHAR:
     case TOK_LINENUM:
+#ifndef TCC_LONG_ARE_64_BIT
+    case TOK_CLONG:
+    case TOK_CULONG:
+#endif
         tab[0] = *p++;
 	cv->i = (*t == TOK_CUINT) ? (unsigned)cv->i : (int)cv->i;
         break;
@@ -1230,6 +1252,10 @@ static inline void TOK_GET(int *t, const int **pp, CValue *cv)
     case TOK_CDOUBLE:
     case TOK_CLLONG:
     case TOK_CULLONG:
+#ifdef TCC_LONG_ARE_64_BIT
+    case TOK_CLONG:
+    case TOK_CULONG:
+#endif
         n = 2;
         goto copy;
     case TOK_CLDOUBLE:
@@ -2407,9 +2433,7 @@ static void parse_number(const char *p)
                 if (lcount && *(p - 1) != ch)
                     tcc_error("incorrect integer suffix: %s", p1);
                 lcount++;
-#if !defined TCC_TARGET_X86_64 || defined TCC_TARGET_PE
                 if (lcount == 2)
-#endif
                     must_64bit = 1;
                 ch = *p++;
             } else if (t == 'U') {
@@ -2426,6 +2450,13 @@ static void parse_number(const char *p)
         if (n & 0xffffffff00000000LL || must_64bit) {
             tok = TOK_CLLONG;
             n1 = n >> 32;
+	} else if (lcount) {
+#ifdef TCC_LONG_ARE_64_BIT
+	    n1 = n >> 32;
+#else
+            n1 = n;
+#endif
+	    tok = TOK_CLONG;
 	} else {
             tok = TOK_CINT;
             n1 = n;
@@ -2435,7 +2466,9 @@ static void parse_number(const char *p)
         if (ucount || ((n1 >> 31) && (b != 10))) {
             if (tok == TOK_CLLONG)
                 tok = TOK_CULLONG;
-            else
+            else if (tok == TOK_CLONG)
+                tok = TOK_CULONG;
+	    else
                 tok = TOK_CUINT;
         /* If decimal and no unsigned suffix, bump to 64 bits or throw error */
         } else if (n1 >> 31) {