Enabling sdiv support in ART

Added more target into ART instruction set feature look-up list

Change-Id: I0ea0097181e5c76507b8ca2a34cf37d2e2ca6403
Merge remote-tracking branch 'cm/cm-12.0' into sm-5.0
build: Add chromium prebuilt support to envsetup.sh && The core Makefile

This adds a chromium_prebuilt function to envsetup.sh that is invoked by lunch to check
whether the chromium prebuilts are up-to-date or not. If not, it will be built from source
and then the new source built version will be pulled during brunch/mka bacon to become the
new prebuilts for future builds.

This is all opt-in through the USE_PREBUILT_CHROMIUM flag. Without it being set to 1,
none of this would be ran, and regular operations will go on.

PS13:
-use export TARGET_DEVICE
-replace git -C with params compatible to old git versions

(vendor repository for script)

Change-Id: I40f8c8dbd2a8a84a5c1b9f47ee04180a71ef4e07
(cherry picked from commit 84bbaf5a7426680b0b3723d11be852f756ed9e86)

Conflicts:
	core/Makefile
Fix chromium