video_splliter: Add XCB flags for panoramix.
video_splliter: Add XCB flags for panoramix.

This patch fixes this build error.

video_splitter/.libs/libpanoramix_plugin_la-panoramix.o: In function `CountMonitors':
modules/video_splitter/panoramix.c:352: undefined reference to `xcb_connect'
modules/video_splitter/panoramix.c:354: undefined reference to `xcb_connection_has_error'
modules/video_splitter/panoramix.c:357: undefined reference to `xcb_get_setup'
modules/video_splitter/panoramix.c:359: undefined reference to `xcb_setup_roots_iterator'
modules/video_splitter/panoramix.c:360: undefined reference to `xcb_screen_next'
modules/video_splitter/panoramix.c:407: undefined reference to `xcb_disconnect'
modules/video_splitter/panoramix.c:407: undefined reference to `xcb_disconnect'
modules/video_splitter/panoramix.c:407: undefined reference to `xcb_disconnect'

Signed-off-by: Vinson Lee <25a259f709b0f1b620605d2518271a846d8826e5@freedesktop.org>
Signed-off-by: Jean-Baptiste Kempf <7b85a41a628204b76aba4326273a3ccc74bd009a@videolan.org>

xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc