elements: fix leading space in plugin description string
elements: fix leading space in plugin description string

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