add clocking stuff to gst.h
add clocking stuff to gst.h

Original commit message from CVS:
add clocking stuff to gst.h

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