design: add initial tracing design doc
design: add initial tracing design doc

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