Prebuilt chromium: add script for lollipop

Change-Id: I3fbef0d23e76a6f5c25579d1ca9336bcfe19290d

Conflicts:
	utils/chromium_prebuilt.sh
utils: Add changelog generator (2/2)

Change-Id: I8a19c8e7707f28a452b234eb7900875806ec1518