Revert "bootstrap: Always build cmake on non-Linux platforms"
Revert "bootstrap: Always build cmake on non-Linux platforms"

This reverts commit 6aa229b3a25b0673c8c224627ef25391c10da4a8.

Apparently the new world order is to install cmake manually.

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