gstversion: Add missing include in .in file.
gstversion: Add missing include in .in file.

krichter722/gstreamer,StreamUtils/gstreamer,centricular/gstreamer,krichter722/gstreamer,centricular/gstreamer,jpxiong/gstreamer,jpxiong/gstreamer,StreamUtils/gstreamer,jpxiong/gstreamer,jpxiong/gstreamer,StreamUtils/gstreamer,krichter722/gstreamer,StreamUtils/gstreamer,krichter722/gstreamer,centricular/gstreamer,krichter722/gstreamer,StreamUtils/gstreamer,jpxiong/gstreamer,centricular/gstreamer,centricular/gstreamer