Switch to GNU-style strerror_r when needed on Android.
Switch to GNU-style strerror_r when needed on Android.

Certain Android configurations use GNU-style strerror_r, signaled by
_GNU_SOURCE with __ANDROID_API__ >= 23.

Change-Id: Ie2e8b0c6d7f8a3d18ede379745dff0dbef61970c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/mini_chromium/+/1611030
Reviewed-by: Eric Astor <992ec5ec5e82ac48af0d69cb9a54373e181066b5@google.com>

chromium/mini_chromium,chromium/mini_chromium,chromium/mini_chromium