cmake: Add -Wall -Werror options to cmake builds
Created by: girishpathak
Currently -Wall, -Wextra and -Werror options are missing for cmake builds. This commit add these options for cmake builds.
Change-Id: I6d2f74f2cd03107127b87f80aa22764694190dac Signed-off-by: Girish Pathak girish.pathak@arm.com