testing: Whitelist all Git repositories in the root image

Without this, Git refuses to operate on the build dirs that are mounted
with weird ownership.  When running as root in the chroot, Git checks
SUDO_UID, which won't match.

testing/scripts/build-strongswan

@@ -165,6 +165,10 @@ if [ "$ALL_RECIPES" ]; then
 		execute "cp -r $RECPDIR/patches $LOOPDIR/root/shared/compile" 0
 	fi
 	RECIPES=`ls $RECPDIR/*.mk | xargs -n1 basename`
+	log_action "Whitelist all Git repositories"
+	echo "[safe]"             > $LOOPDIR/root/.gitconfig
+	echo "    directory = *" >> $LOOPDIR/root/.gitconfig
+	log_status 0
 else
 	echo "Building and installing strongSwan"
 	RECIPES=`ls $RECPDIR/*strongswan.mk | xargs -n1 basename`