autobuild: add autobuild scripts

autobuild: add autobuild scripts

 - Add agl autobuild script to silence build
   warnings on yocto.
 - Add linux autobuild script to build with
   the sdk
 - These  scripts are based on the latest
   version of the autobuild script, but they've
   been customized to match the existin cmake
   (the update and package-test targets have been
   removed).

Change-Id: I6f8bd89ee0dfe770557e9a9b6d7729f30735ce43
Signed-off-by: Raquel Medina <raquel.medina@konsulko.com>
(cherry picked from commit 256c66de221e748638c7cb0193bfe52ed312be93)