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/stdio/ftrylockfile.c

@@ -23,6 +23,6 @@
  *
  * @return 0 on success, or non-zero if another thread owns the lock
  */
-int ftrylockfile(FILE *f) {
+int(ftrylockfile)(FILE *f) {
   return pthread_mutex_trylock(&f->lock);
 }