LIBTCCAPI tcc_relocate(s) : REMOVED 2nd argument

removed second argument for tcc_relocate(s). previous
'TCC_RELOCATE_AUTO' is now default and only behavior.

Rationale:
  In the past, the option to compile into memory provided by the
  user was introduced because only one TCCState could exist at a time.

  This is no longer a limitation.  As such it is also possible now to
  keep any number of compiled code snippets around together with their
  state in order to run them as needed.

- Also
  - LIBTCCAPI tcc_get_error_func/opaque() removed
  - tccrun/SELINUX: switch rx/rw mappings such that rx comes first
    (risc64-link.c:relocate_plt() does not like got < plt)
  - tcc_relocate_ex(): free local symbols and obsolete sections
    to reduce memory after tcc_relocate()

tests/abitest.c

@@ -1,4 +1,3 @@
-#include <unistd.h>
 #include <libtcc.h>
 #include <stdlib.h>
 #include <stdio.h>
@@ -53,7 +52,7 @@ static int run_callback(const char *src, callback_type callback) {
     return -1;
   if (tcc_compile_string(s, src) == -1)
     return -1;
-  if (tcc_relocate(s, TCC_RELOCATE_AUTO) == -1)
+  if (tcc_relocate(s) == -1)
     return -1;
   
   ptr = tcc_get_symbol(s, "f");

tests/libtcc_test.c

@@ -6,8 +6,6 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
-#include <assert.h>
-
 #include "libtcc.h"
 
 void handle_error(void *opaque, const char *msg)
@@ -59,14 +57,9 @@ int main(int argc, char **argv)
         exit(1);
     }
 
-    assert(tcc_get_error_func(s) == NULL);
-    assert(tcc_get_error_opaque(s) == NULL);
-
+    /* set custom error/warning printer */
     tcc_set_error_func(s, stderr, handle_error);
 
-    assert(tcc_get_error_func(s) == handle_error);
-    assert(tcc_get_error_opaque(s) == stderr);
-
     /* if tcclib.h and libtcc1.a are not installed, where can we find them */
     for (i = 1; i < argc; ++i) {
         char *a = argv[i];
@@ -92,7 +85,7 @@ int main(int argc, char **argv)
     tcc_add_symbol(s, "hello", hello);
 
     /* relocate the code */
-    if (tcc_relocate(s, TCC_RELOCATE_AUTO) < 0)
+    if (tcc_relocate(s) < 0)
         return 1;
 
     /* get entry symbol */

tests/libtcc_test_mt.c

@@ -128,7 +128,7 @@ void *reloc_state(TCCState *s, const char *entry)
 {
     void *func;
     tcc_add_symbol(s, "add", add);
-    if (tcc_relocate(s, TCC_RELOCATE_AUTO) < 0) {
+    if (tcc_relocate(s) < 0) {
         fprintf(stderr, __FILE__ ": could not relocate tcc state.\n");
         return NULL;
     }