Fix gsm to check for "gsm.h" as well as "gsm/gsm.h".
Fix gsm to check for "gsm.h" as well as "gsm/gsm.h".

Original commit message from CVS:
Fix gsm to check for "gsm.h" as well as "gsm/gsm.h".

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