libaom: move aom_config to config sub dir

The include structure has changed in libaom.

Bug: 783519
Change-Id: Ibea981e41e25ef5aa18c3c840b6ebfae9ceee526
Reviewed-on: https://chromium-review.googlesource.com/1074797
Reviewed-by: Johann Koenig <johannkoenig@google.com>
Commit-Queue: Johann Koenig <johannkoenig@google.com>
Cr-Commit-Position: refs/heads/master@{#562559}
1 file changed