vendor: Allow devices to set the GMS client id

This will look for flags in omni_<device>.mk, if none preset, use ro.com.google.clientidbase=android-google

Conflicts:
	config/common.mk

Change-Id: I42957104837b96ea24e485c8dd2e6332ff42d5b7
utils: fork_github: Fix typo in forcepush

Change-Id: Icf3a4ab6bc5c660d2343a4f6827407e032fc1efa
Merge "utils: fork_github: Fix typo in forcepush" into android-4.4
Merge "vendor: Allow devices to set the GMS client id" into android-4.4
Merge branch 'android-4.4' of https://github.com/omnirom/android_vendor_omni into android-4.4