added GST_CFLAGS
added GST_CFLAGS

Original commit message from CVS:
added GST_CFLAGS

ylatuya/gstreamer,drothlis/gstreamer,krichter722/gstreamer,surround-io/gstreamer,mrchapp/gstreamer,Distrotech/gstreamer,mparis/gstreamer,Distrotech/gstreamer,krichter722/gstreamer,ensonic/gstreamer,ensonic/gstreamer,mrchapp/gstreamer,centricular/gstreamer,cablelabs/gstreamer,shelsonjava/gstreamer,justinjoy/gstreamer,ahmedammar/platform_external_gst_gstreamer,magcius/gstreamer,justinjoy/gstreamer,drothlis/gstreamer,jpxiong/gstreamer,jpakkane/gstreamer,ylatuya/gstreamer,ahmedammar/platform_external_gst_gstreamer,cfoch/gstreamer,ylatuya/gstreamer,magcius/gstreamer,krieger-od/gstreamer,krieger-od/gstreamer,shelsonjava/gstreamer,collects/gstreamer,shelsonjava/gstreamer,surround-io/gstreamer,Distrotech/gstreamer,ensonic/gstreamer,Lachann/gstreamer,cablelabs/gstreamer,justinjoy/gstreamer,krichter722/gstreamer,mparis/gstreamer,krieger-od/gstreamer,ensonic/gstreamer,collects/gstreamer,cfoch/gstreamer,lovebug356/gstreamer,cablelabs/gstreamer,ahmedammar/platform_external_gst_gstreamer,collects/gstreamer,cfoch/gstreamer,justinjoy/gstreamer,jpxiong/gstreamer,centricular/gstreamer,cablelabs/gstreamer,jpxiong/gstreamer,lovebug356/gstreamer,krieger-od/gstreamer,collects/gstreamer,Distrotech/gstreamer,StreamUtils/gstreamer,jpakkane/gstreamer,Lachann/gstreamer,jpxiong/gstreamer,drothlis/gstreamer,surround-io/gstreamer,ahmedammar/platform_external_gst_gstreamer,Lachann/gstreamer,mrchapp/gstreamer,cablelabs/gstreamer,surround-io/gstreamer,StreamUtils/gstreamer,lubosz/gstreamer,lovebug356/gstreamer,jpakkane/gstreamer,StreamUtils/gstreamer,cfoch/gstreamer,lubosz/gstreamer,cfoch/gstreamer,mparis/gstreamer,surround-io/gstreamer,jpakkane/gstreamer,magcius/gstreamer,jpxiong/gstreamer,shelsonjava/gstreamer,mparis/gstreamer,Distrotech/gstreamer,mparis/gstreamer,centricular/gstreamer,ensonic/gstreamer,Lachann/gstreamer,StreamUtils/gstreamer,shelsonjava/gstreamer,ylatuya/gstreamer,lubosz/gstreamer,centricular/gstreamer,lovebug356/gstreamer,lubosz/gstreamer,StreamUtils/gstreamer,krichter722/gstreamer,collects/gstreamer,lovebug356/gstreamer,drothlis/gstreamer,jpakkane/gstreamer,magcius/gstreamer,magcius/gstreamer,drothlis/gstreamer,justinjoy/gstreamer,mrchapp/gstreamer,krieger-od/gstreamer,lubosz/gstreamer,ahmedammar/platform_external_gst_gstreamer,krichter722/gstreamer,ylatuya/gstreamer,centricular/gstreamer,mrchapp/gstreamer,Lachann/gstreamer