porting: update porting document
porting: update porting document

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