ANDROID: netfilter: xt_qtaguid/xt_socket: Build fixups

Fix up build kuid/kguid build issues in netfilter code.

Also re-add the xt_socket_get/put_sk interfaces needed by xt_qtaguid.

Change-Id: I7027fb840e109785bddffe8ea717b8d018b26d82
Signed-off-by: John Stultz <john.stultz@linaro.org>

[AmitP: Folded following android-4.9 commit changes into this patch
        da5ea99a74f2 ("ANDROID: netfilter: xt_qtaguid: fix seq_printf type mismatch warning")
        070eff8f023c ("ANDROID: netfilter: xt_qtaguid: fix broken uid/gid range check")]
        2879b6ec24ee ("ANDROID: xt_qtaguid: use sock_gen_put() instead of xt_socket_put_sk()")]
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>