add lazy scripts to work in source so people dont type becon of bacon

Change-Id: I57a6c7c86397862f39c85e2d449f99e55c7b800f
amend some tings

Change-Id: If630e3c9f0cb4a86da5d82468cfcad38f5a34869
make bacon

Change-Id: Ia13dfc63268853aa355034061a25a1ba8a71003d
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

Change-Id: I40f8c8dbd2a8a84a5c1b9f47ee04180a71ef4e07
Revert "build: Add chromium prebuilt support to envsetup.sh && The core Makefile"

This reverts commit b48aab6a5b0496aef98e75f15ceffeb72d8afee4.

Change-Id: Iea7e9672ca78b51fac712f0b02325657e8b12620
Merge branch 'android-4.4' of https://github.com/MerkMod/android_build into armv6-4.4