boot_flash_from_image: Strip kernel modules

Change-Id: I36168705cc71d10e1d9a4613207660d5bbf167b8
Merge "boot_flash_from_image: Strip kernel modules" into kk4.4
Merge branch 'kk4.4' of https://github.com/SlimRoms/android_build into kk4.4

Conflicts:
	tools/releasetools/boot_flash_from_image

Change-Id: I950917f7f28b13aaa70b565f7d8c0a650e2bcbc4