Apply even more fixups

- Finish cleaning up the stdio unlocked APIs
- Make __cxa_finalize() properly thread safe
- Don't log locks if threads aren't being used
- Add some more mutex guards to places using _mmi
- Specific lock names now appear in the --ftrace logs
- Fix mkdeps.com generating invalid Makefiles sometimes
- Simplify and fix bugs in the test runner infrastructure
- Fix issue where sometimes some functions wouldn't be logged

libc/str/memchr.c

@@ -69,8 +69,10 @@ noasan static inline const unsigned char *memchr_sse(const unsigned char *s,
  */
 void *memchr(const void *s, int c, size_t n) {
   const void *r;
-  if (X86_HAVE(SSE)) {
-    if (IsAsan()) __asan_verify(s, n);
+  if (!IsTiny() && X86_HAVE(SSE)) {
+    if (IsAsan()) {
+      __asan_verify(s, n);
+    }
     r = memchr_sse(s, c, n);
   } else {
     r = memchr_pure(s, c, n);