Add AM_PROG_CC_C_O, thus fixing this warning: tests/Makefile.am:16: compiling `test-display.c' with per-target flags requires `AM_PROG_CC_C_O' in `configure.ac'
Add AM_PROG_CC_C_O, thus fixing this warning:
tests/Makefile.am:16: compiling `test-display.c' with per-target flags requires `AM_PROG_CC_C_O' in `configure.ac'


sreerenjb/sree-gstreamer-vaapi,CapOM/gstreamer-vaapi,ceyusa/gstreamer-vaapi,GStreamer/gstreamer-vaapi,gbeauchesne/gstreamer-vaapi,GStreamer/gstreamer-vaapi,CapOM/gstreamer-vaapi,sreerenjb/sree-gstreamer-vaapi,gbeauchesne/gstreamer-vaapi,01org/iotg-lin-gfx-gstreamer-vaapi,ceyusa/gstreamer-vaapi,01org/iotg-lin-gfx-gstreamer-vaapi,gbeauchesne/gstreamer-vaapi,CapOM/gstreamer-vaapi,sreerenjb/sree-gstreamer-vaapi,01org/iotg-lin-gfx-gstreamer-vaapi