Allow to install os-resource-classes from git repo

Example local.conf config snippet:

LIBS_FROM_GIT="os-resource-classes"
OS_RESOURCE_CLASSES_REPO="${LOCAL_GIT_BASE}/os-resource-classes"
OS_RESOURCE_CLASSES_BRANCH="dev_branch"

Closes-Bug: #1934784
Change-Id: I972a2a49aa816433152e5cfac4f672c0465d083f
3 files changed