r69778, trying initial tlpretest build yet again, hopefully without arm/aarch

aarch64 and armhf are taking forever (1h50m and counting), try disabl…

…ing.

Also try disabling the build-on-push-to-trunk for
the moment.


git-svn-id: svn://tug.org/texlive/trunk/Build/source@69779 c570f23f-e606-0410-a88d-b1316a301751