Adjust runtime for recent ABI change on x86-64, since member functions are no longer equivalent to regular functions with `this` as their first argument. (They weren't anyway, but it happened to work as long as there was no `sret` parameter)

#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