gitlab-ci: exclude scripts that don't affect the build
All the other files in bin/
are not used by any build system and as such
cannot affect the build.
I've been working on maintainer-scripts lately and it's frustrating to have the CI wait for 45 minutes to rebuild everything and not even read/run the files in the MR when it could've just been merged and moved on to the next MR 45 minutes ago.
/cc @dbaker @tpalli @jrfonseca to confirm that meson/android/scons don't use any other file from bin/
?