CI: Attempt to throttle load caused by builds better

Use the support that both make and ninja have to hold back on starting new parallel jobs if load is higher than a set number.

Use the $CI_ONIRO_NUM_CPUS variable if set, or the output of nproc command to set sane values.

For most cases, this means that CI runners don't have to set anything, as nproc output should be fine.

Closes eclipse/oniro-core/meta-openharmony#33

Signed-off-by: Esben Haabendal esben.haabendal@huawei.com

.gitlab-ci.yml

@@ -76,7 +76,7 @@ stages:
     # The repo tool seems to insist on having a branch checked out or
     # something like that... Without this we get errors like
     #     fatal: couldn't find remote ref refs/heads/master
-    - git checkout -b master
+    - git checkout -b master && git fetch --unshallow
     # Create/maintain a mirror of all manifest repositories in runner
     # persistent storage, and use that as reference when initializing the
     # build repo, effectively reducing the time spent fetching git repos to