tools: update for latest context API changes
tools: update for latest context API changes

justinjoy/gstreamer,mparis/gstreamer,centricular/gstreamer,Lachann/gstreamer,justinjoy/gstreamer,krieger-od/gstreamer,Lachann/gstreamer,cablelabs/gstreamer,jpakkane/gstreamer,mparis/gstreamer,collects/gstreamer,cfoch/gstreamer,lubosz/gstreamer,shelsonjava/gstreamer,StreamUtils/gstreamer,centricular/gstreamer,Lachann/gstreamer,collects/gstreamer,shelsonjava/gstreamer,jpakkane/gstreamer,lovebug356/gstreamer,centricular/gstreamer,surround-io/gstreamer,ensonic/gstreamer,lovebug356/gstreamer,cablelabs/gstreamer,krichter722/gstreamer,surround-io/gstreamer,StreamUtils/gstreamer,lubosz/gstreamer,lovebug356/gstreamer,Lachann/gstreamer,jpxiong/gstreamer,jpxiong/gstreamer,cablelabs/gstreamer,shelsonjava/gstreamer,StreamUtils/gstreamer,cablelabs/gstreamer,krieger-od/gstreamer,StreamUtils/gstreamer,krichter722/gstreamer,mparis/gstreamer,krichter722/gstreamer,ensonic/gstreamer,centricular/gstreamer,jpxiong/gstreamer,mparis/gstreamer,cablelabs/gstreamer,ensonic/gstreamer,lubosz/gstreamer,mparis/gstreamer,cfoch/gstreamer,cfoch/gstreamer,krichter722/gstreamer,lovebug356/gstreamer,jpxiong/gstreamer,ensonic/gstreamer,Lachann/gstreamer,cfoch/gstreamer,krieger-od/gstreamer,jpakkane/gstreamer,cfoch/gstreamer,justinjoy/gstreamer,krieger-od/gstreamer,jpakkane/gstreamer,shelsonjava/gstreamer,jpxiong/gstreamer,lubosz/gstreamer,collects/gstreamer,lubosz/gstreamer,justinjoy/gstreamer,surround-io/gstreamer,centricular/gstreamer,krieger-od/gstreamer,shelsonjava/gstreamer,surround-io/gstreamer,collects/gstreamer,surround-io/gstreamer,StreamUtils/gstreamer,jpakkane/gstreamer,ensonic/gstreamer,collects/gstreamer,lovebug356/gstreamer,krichter722/gstreamer,justinjoy/gstreamer