ndk: Fixes PTHREAD_RWLOCK_INITIALIZER definition.

This is a fix for http://code.google.com/p/android/issues/detail?id=15306

Also see https://review.source.android.com//#change,21699 for the corresponding
fix in the C library headers.

Change-Id: I1c46ee9fc7eb120a98f47719a0407b81001f5ac0
1 file changed