Refine codes and fix several issues (#1094)

Add aot relocation for ".rodata.str" symbol to support more cases
Fix some coding style issues
Fix aot block/value stack destroy issue
Refine classic/fast interpreter codes
Clear compile warning of libc_builtin_wrapper.c in 32-bit platform

core/shared/platform/linux-sgx/sgx_platform.c

@@ -90,8 +90,8 @@ strcpy(char *dest, const char *src)
     const unsigned char *s = src;
     unsigned char *d = dest;
 
-    while ((*d++ = *s++))
-        ;
+    while ((*d++ = *s++)) {
+    }
     return dest;
 }