Update codegen to (hopefully) work correctly with newer LLVM trunk, where there's no longer a Fast flag. (It has been replaced by an optimization level) Untested because I haven't compiled that recent an LLVM yet :).

#ifndef _GNUC_H
#define _GNUC_H 1

int memicmp(const char *s1, const char *s2, int n);
int stricmp(const char *s1, const char *s2);

#endif