tree e111b72eca9f3a67c414d684b8a3980293e56720
parent 9d928b1df1a870e68f06791dda02058e2327b31a
author Wan-Teh Chang <wtc@google.com> 1537485293 -0700
committer Wan-Teh Chang <wtc@google.com> 1537491996 +0000

Clean up thread name support.

1. Define _GNU_SOURCE only if it's not defined, because the file may be
compiled with -D_GNU_SOURCE, which defines _GNU_SOURCE as 1, not empty.

2. Test worker->thread_name with NULL explicitly.

3. Shorten the thread name "aom frame worker" to "aom frameworker" so
it won't be truncated.

BUG=aomedia:2167

Change-Id: I7822c0ab80910769230206873f2bca6045d1396e