tccrun: another incompatible change to the tcc_relocate API

We are now compatible with the 0.9,25 version though.  A special
value for the second (ptr) argument is used to get the simple
behavior as with the 0.9.24 version.

tests/libtcc_test.c

@@ -58,7 +58,7 @@ int main(int argc, char **argv)
     tcc_add_symbol(s, "add", add);
 
     /* relocate the code */
-    if (tcc_relocate(s) < 0)
+    if (tcc_relocate(s, TCC_RELOCATE_AUTO) < 0)
         return 1;
 
     /* get entry symbol */