qcom-common: Enable QC A/V enhancements

Change-Id: I1b42a5cf0f50d914401e429c1a74bd347e345ad8
qcom-common: add mac-update

Change-Id: If1ab5a6bb7d7f402073796cfaa39dd87af02222a
libril: switch to RLOGx

* Also add liblog, while I'm at it.

Change-Id: Ia647827c27372bbbe69eb7c43e644532cde10519