These symbols should be public (and Firefox uses them), and we'd also probably
rather have the upstream thread-safe implementation.
Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1030899
Change-Id: I2a5888fbb3198546848398f576fd2195ff3fe00c
I screwed up when I originally imported these files; they're in lib/libc/
in the upstream tree; there is no top-level libc/ (though there is a top-level
common/, so those files stay where they are).
Change-Id: I7c5e2224a4441ab0e33616a855a8c6aacfeac46f