[tsan] Allow memmove interceptor to be used when TSan is not initialized

[kubamracek]

Summary

A call to memmove is used early during new thread initialization on OS X. This patch uses the COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED check, similarly to how we deal with other early-used interceptors.

compiler-rt/trunk/lib/tsan/rtl/tsan_interceptors.cc

if (!COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED) {
     SCOPED_TSAN_INTERCEPTOR(memcpy, dst, src, size);
     MemoryAccessRange(thr, pc, (uptr)dst, size, true);
     MemoryAccessRange(thr, pc, (uptr)src, size, false);
   }
   return internal_memcpy(dst, src, size);
 }
 
 TSAN_INTERCEPTOR(void*, memmove, void *dst, void *src, uptr n) {
+  if (!COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED) {
     SCOPED_TSAN_INTERCEPTOR(memmove, dst, src, n);
     MemoryAccessRange(thr, pc, (uptr)dst, n, true);
     MemoryAccessRange(thr, pc, (uptr)src, n, false);
+  }
   return REAL(memmove)(dst, src, n);
 }
 
 TSAN_INTERCEPTOR(char*, strchr, char *s, int c) {
   SCOPED_TSAN_INTERCEPTOR(strchr, s, c);
   char *res = REAL(strchr)(s, c);
   uptr len = internal_strlen(s);
   uptr n = res ? (char*)res - (char*)s + 1 : len + 1;