scripts: gcc-wrapper: actually parse warning messages

Change-Id: Ied9862be7601957aa6f3952a0f8970a6cbcb5563
misc: Fix GCC warnings

Change-Id: If5d614236f08e67f0de90fb5b2fa3bfc0dc2b72b

Conflicts:
	drivers/media/common/tuners/xc4000.c
	net/netfilter/xt_socket.c