Btrfs: fix a memory leak in btrfs_init_acl

In btrfs_init_acl() cloned acl is not released

Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index fa44e92..da3133c 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -269,6 +269,7 @@
 						    ACL_TYPE_ACCESS);
 			}
 		}
+		posix_acl_release(clone);
 	}
 failed:
 	posix_acl_release(acl);