configure.ac: Detect broken poll()
configure.ac: Detect broken poll()

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