Relax check for .git to support freeipa in submodules
Let's relax the check for .git from directory to exists in order to
support freeipa in a git submodule. Submodules have a .git file with
content like
gitdir: ../.git/modules/freeipa
Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Petr Spacek <pspacek@redhat.com>