Cast the fifth arg to mremap to void *

[hjl.tools]

Summary

Since the prototype of mremap is

void *mremap(void *old_address, size_t old_size, size_t new_size,
	     int flags, ... /* void *new_address*/);

we need to cast new_address to void * when calling mremap. Otherwise,
the wrong value will be passed to mremap on x32.

[samsonov]

LGTM

[hjl.tools]

Please check it in for me. Thanks.

lib/cfi/cfi.cc

   if (main_shadow) {
     // Update.
     void *res = mremap((void *)shadow_, GetShadowSize(), GetShadowSize(),
-                       MREMAP_MAYMOVE | MREMAP_FIXED, main_shadow);
+                       MREMAP_MAYMOVE | MREMAP_FIXED, (void *)main_shadow);
     CHECK(res != MAP_FAILED);
   } else {
     // Initial setup.