Added the avi makefiles.
Added the avi makefiles.

Original commit message from CVS:
Added the avi makefiles.

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