kernel_android: Remove unnecessary cd and rm

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
meta-android: android-system-image-tuna: don't run do_package_shlibs to remove not wanted RDEPENDS

This reduces the size of our images of about 200M which are only needed for debugging
purposes and not for a real user.

Signed-off-by: Simon Busch <morphis@gravedo.de>