build/f_repos: Allow out-of-tree .git dir

ArmbandFuel@OPNFV uses Fuel@OPNFV git repo as a submodule, so
its .git dir is located outside work tree root (F_GIT_ROOT).

Allow this setup by parsing `git rev-parse --git-dir` intead of
harcoding git dir path.

Fixes: FUEL-200

Change-Id: Ia7f3b23e9333356fe05b9ed0565218f2c7ec8eba
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

0 files changed, 0 insertions, 0 deletions