ci: try to get binpkgs for dev-vcs/git and friends (via eselect-repository)

This should speed things up a little bit to avoid needlessly building
dev-vcs/git over and over at the start of each job.

Signed-off-by: Sam James <sam@gentoo.org>

Author: thesamesam

scripts/container_test.sh

@@ -93,7 +93,8 @@ done
 	/bin/sleep inf
 
 run_in_container emerge-webrsync
-run_in_container emerge app-eselect/eselect-repository sys-apps/config-site
+run_in_container getuto
+run_in_container emerge --getbinpkg app-eselect/eselect-repository sys-apps/config-site
 run_in_container make install
 run_in_container eselect repository create crossdev
 run_in_container crossdev --show-fail-log --target "${TARGET}"