Work around missing PTHREAD_RWLOCK_INITIALIZER in NaCl newlib.

This can be removed once NaCl is fixed and the fix rolls into Chromium. See
https://code.google.com/p/nativeclient/issues/detail?id=4160

See
https://codereview.chromium.org/951583004/diff/60001/src/untrusted/pthread/pthread.h#pair-132
https://codereview.chromium.org/951583004/diff/60001/src/untrusted/pthread/nc_rwlock.c#pair-48

Change-Id: I21e6d97b24c17f21aa97ee0f71d374400455c441
Reviewed-on: https://boringssl-review.googlesource.com/4590
Reviewed-by: Adam Langley <agl@google.com>
1 file changed