this is a maintenance update for platforms not yet ported to 4.x branch
- update RetroArch to 1.10.1
- update cores on par with Lakka 4.0 in branch Lakka-v4.x
- bump Lakka version to 3.7.1
- add PKG_SKIP_SUBMODULE variable (pcsx_rearmed has obsolete submodule
registration, which breaks cloning the repo and pulling submodules)
- bump cmake to 3.15.0 (required by play)