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/flockfile.c

@@ -21,6 +21,6 @@
 /**
  * Acquires reentrant lock on stdio object, blocking if needed.
  */
-void flockfile(FILE *f) {
+void(flockfile)(FILE *f) {
   pthread_mutex_lock(&f->lock);
 }