scripts/osmo-build.sh / ARTIFACT_STORE: remove

This script was supposed to cache already built Osmocom libraries. But
it was only used with openbsc, didn't work as expected anymore (looking
at openbsc-master, it just builds all deps from source without caching)
and will be replaced with logic that allows using ccache in a future
patch.

Using ccache has the big advantage that we can cache all build objects
where the source files did not change, and not just do it on a
dependency level. Oftentimes only few source files change in our
patches, so we can really cache everything else that is not affected
within any git repository and not just a dependency that didn't change.

ccache also does automatic cache size management to ensure a cache stays
within a given size limit.

Related: OS#5848
Depends: openbsc Ib3272feec76b30412ca60dec204255b64e33831b
Change-Id: Id94d6126b476077d57839e4a884621b8c034f0c6
3 files changed