audio fixes

 - audio: Fix CRAS bug (hanging cras_test_client): Introduced in upstream version 5339, fixed in version 5579, see http://crbug.com/347997 . Patching until we know if upstream wants to include it in R34-5500 (I guess they won't unless it breaks something else).
 - audio: Detect ADHD commit id from manifests if no branch available (typical with XXXX.0.0 builds). Also removed `master` fallback as this should never be required. Fixes the root cause of #711.
 - audio: patch_cras_x86_x86_64 is not required anymore on build >=5652. See http://crbug.com/309961. Fixes the symptom in #711.