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/putc.c

@@ -23,7 +23,8 @@
  *
  * @param c is byte to buffer or write, which is masked
  * @return c as unsigned char if written or -1 w/ errno
+ * @threadsafe
  */
-int(putc_unlocked)(int c, FILE *f) {
-  return fputc_unlocked(c, f);
+int(putc)(int c, FILE *f) {
+  return fputc(c, f);
 }