The getentropy_linux.c is lightly modified to build on Android, but we're now
completely in sync with upstream OpenBSD's arc4random implementation.
(cherry picked from commit 2b67d7dee09852789d9ac7d8972ed6cdb2c18430)
Change-Id: Icc939b5fa2fcac3e15ff93735d2d34f67e9bb149
This is actually revision 1.33, which is no longer the latest, but it's
as close to head as we can currently reasonably get. I've also switched
to the OpenBSD getentropy_linux.c implementation of getentropy, lightly
modified to try to report an error on failure.
Bug: 14499627
Change-Id: Ia7c561184b1f366c9bf66f248aa60f0d53535fcb
Also neuter __isthreaded.
We should come back to try to hide struct FILE's internals for LP64.
Bug: 3453512
Bug: 3453550
Change-Id: I7e115329fb4579246a72fea367b9fc8cb6055d18
