Add README.md

Change-Id: Ib9558dcab343e24ce619f5b6dc31faad9bf416d9
Replace external/clang path to new repository android_external_clang

Change-Id: I853f7fcc49614cfbbfc45a598052f6e541d2ee9d
Replace packages/apps/PackageInstaller path to new repository android_packages_apps_PackageInstaller

Change-Id: I93e20d2099d48a6e816c17ee92e125e0c14847c1
Replace hardware/ti/omap4xxx/ path to new repository
 android_hardware_ti_omap4xxx

Change-Id: I50ce7d2c6fb075678559bf2fd1a5febd354577db