gensdkshell: fix typo in error message
gensdkshell: fix typo in error message

freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,nirbheek/cerbero,justinjoy/cerbero,fluendo/cerbero,EricssonResearch/cerbero,fluendo/cerbero,ylatuya/cerbero,OptoFidelity/cerbero,brion/cerbero,ylatuya/cerbero,shoreflyer/cerbero,EricssonResearch/cerbero,shoreflyer/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,multipath-rtp/cerbero,fluendo/cerbero,nicolewu/cerbero,jackjansen/cerbero,nzjrs/cerbero,EricssonResearch/cerbero,centricular/cerbero,nirbheek/cerbero,multipath-rtp/cerbero,GStreamer/cerbero,nirbheek/cerbero-old,centricular/cerbero,OptoFidelity/cerbero,atsushieno/cerbero,ylatuya/cerbero,GStreamer/cerbero,nzjrs/cerbero,nirbheek/cerbero,flexVDI/cerbero,justinjoy/cerbero,nirbheek/cerbero-old,jackjansen/cerbero-2013,ikonst/cerbero,ikonst/cerbero,superdump/cerbero,ford-prefect/cerbero,davibe/cerbero,ikonst/cerbero,jackjansen/cerbero-2013,shoreflyer/cerbero,lubosz/cerbero,ikonst/cerbero,lubosz/cerbero,flexVDI/cerbero,shoreflyer/cerbero,ford-prefect/cerbero,BigBrother-International/gst-cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,ramaxlo/cerbero,multipath-rtp/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,ford-prefect/cerbero,sdroege/cerbero,justinjoy/cerbero,cee1/cerbero-mac,GStreamer/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,jackjansen/cerbero,lubosz/cerbero,ikonst/cerbero,nzjrs/cerbero,sdroege/cerbero,AlertMe/cerbero,atsushieno/cerbero,centricular/cerbero,flexVDI/cerbero,davibe/cerbero,fluendo/cerbero,atsushieno/cerbero,sdroege/cerbero,davibe/cerbero,OptoFidelity/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,brion/cerbero,nicolewu/cerbero,nicolewu/cerbero,cee1/cerbero-mac,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,jackjansen/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,shoreflyer/cerbero,nirbheek/cerbero-old,centricular/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,BigBrother-International/gst-cerbero,AlertMe/cerbero,multipath-rtp/cerbero,jackjansen/cerbero,justinjoy/cerbero,centricular/cerbero,brion/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,GStreamer/cerbero,sdroege/cerbero,jackjansen/cerbero-2013,davibe/cerbero,BigBrother-International/gst-cerbero,brion/cerbero,atsushieno/cerbero,AlertMe/cerbero,cee1/cerbero-mac,ylatuya/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,ford-prefect/cerbero,atsushieno/cerbero,GStreamer/cerbero,OptoFidelity/cerbero,brion/cerbero,flexVDI/cerbero,jackjansen/cerbero-2013,AlertMe/cerbero,ramaxlo/cerbero,superdump/cerbero,multipath-rtp/cerbero,nirbheek/cerbero-old,jackjansen/cerbero-2013,EricssonResearch/cerbero,sdroege/cerbero,nzjrs/cerbero,cee1/cerbero-mac,ramaxlo/cerbero,ramaxlo/cerbero,flexVDI/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,superdump/cerbero,EricssonResearch/cerbero,BigBrother-International/gst-cerbero,nirbheek/cerbero,superdump/cerbero,lubosz/cerbero,BigBrother-International/gst-cerbero,ramaxlo/cerbero,AlertMe/cerbero,fluendo/cerbero,nzjrs/cerbero