Merge branch 'ad/ssh-signing-testfix'

Fix ssh-signing test to work on a platform where the default ACL is
overly loose to upset OpenSSH (reported on an installation of Cygwin).

* ad/ssh-signing-testfix:
  t/lib-git.sh: fix ACL-related permissions failure

Author: gitster

t/lib-gpg.sh

@@ -106,6 +106,7 @@ test_lazy_prereq GPGSSH '
 	test $? = 0 || exit 1;
 	mkdir -p "${GNUPGHOME}" &&
 	chmod 0700 "${GNUPGHOME}" &&
+	(setfacl -k "${GNUPGHOME}" 2>/dev/null || true) &&
 	ssh-keygen -t ed25519 -N "" -C "git ed25519 key" -f "${GPGSSH_KEY_PRIMARY}" >/dev/null &&
 	echo "\"principal with number 1\" $(cat "${GPGSSH_KEY_PRIMARY}.pub")" >> "${GPGSSH_ALLOWED_SIGNERS}" &&
 	ssh-keygen -t rsa -b 2048 -N "" -C "git rsa2048 key" -f "${GPGSSH_KEY_SECONDARY}" >/dev/null &&