module.bbclass: make sure do_make_scripts() executes after do_patch()
If do_make_scripts() executes before do_unpack()/do_patch(), the build
fails because it can't cd into the workdir of a recipe using this
class, so make sure do_make_scripts() doesn't run before the package
has been unpacked and patched.
Fixes [YOCTO #3589].
Signed-off-by: Tom Zanussi <tom.zanussi@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>