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/putwc.c

@@ -22,7 +22,8 @@
  * Writes wide character to stream.
  *
  * @return wc if written or -1 w/ errno
+ * @threadsafe
  */
-wint_t(putwc_unlocked)(wchar_t wc, FILE *f) {
-  return fputwc_unlocked(wc, f);
+wint_t(putwc)(wchar_t wc, FILE *f) {
+  return fputwc(wc, f);
 }