config: Don't force PYTHON env variable
config: Don't force PYTHON env variable

And avoid breaking macosx build (which doesn't have python2 defined)

freedesktop-unofficial-mirror/gstreamer__cerbero,OptoFidelity/cerbero,nzjrs/cerbero,justinjoy/cerbero,ramaxlo/cerbero,AlertMe/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,atsushieno/cerbero,ford-prefect/cerbero,nzjrs/cerbero,flexVDI/cerbero,shoreflyer/cerbero,brion/cerbero,ikonst/cerbero,atsushieno/cerbero,nirbheek/cerbero-old,justinjoy/cerbero,ramaxlo/cerbero,flexVDI/cerbero,nirbheek/cerbero,multipath-rtp/cerbero,sdroege/cerbero,jackjansen/cerbero,fluendo/cerbero,brion/cerbero,multipath-rtp/cerbero,ikonst/cerbero,lubosz/cerbero,brion/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,fluendo/cerbero,GStreamer/cerbero,ikonst/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,jackjansen/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,fluendo/cerbero,brion/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,AlertMe/cerbero,centricular/cerbero,EricssonResearch/cerbero,shoreflyer/cerbero,atsushieno/cerbero,sdroege/cerbero,shoreflyer/cerbero,GStreamer/cerbero,lubosz/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,sdroege/cerbero,superdump/cerbero,ford-prefect/cerbero,nzjrs/cerbero,shoreflyer/cerbero,atsushieno/cerbero,flexVDI/cerbero,shoreflyer/cerbero,superdump/cerbero,flexVDI/cerbero,EricssonResearch/cerbero,nirbheek/cerbero-old,ramaxlo/cerbero,centricular/cerbero,superdump/cerbero,jackjansen/cerbero,GStreamer/cerbero,atsushieno/cerbero,lubosz/cerbero,justinjoy/cerbero,ikonst/cerbero,nirbheek/cerbero-old,multipath-rtp/cerbero,lubosz/cerbero,ikonst/cerbero,OptoFidelity/cerbero,jackjansen/cerbero,sdroege/cerbero,EricssonResearch/cerbero,EricssonResearch/cerbero,nirbheek/cerbero,nzjrs/cerbero,EricssonResearch/cerbero,GStreamer/cerbero,centricular/cerbero,AlertMe/cerbero,justinjoy/cerbero,GStreamer/cerbero,ford-prefect/cerbero,OptoFidelity/cerbero,nzjrs/cerbero,OptoFidelity/cerbero,nirbheek/cerbero,centricular/cerbero,ramaxlo/cerbero,nirbheek/cerbero-old,superdump/cerbero,ford-prefect/cerbero,flexVDI/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,multipath-rtp/cerbero,multipath-rtp/cerbero,brion/cerbero,fluendo/cerbero,ramaxlo/cerbero,nirbheek/cerbero,AlertMe/cerbero,AlertMe/cerbero,fluendo/cerbero,sdroege/cerbero,centricular/cerbero