There is no need for += when using append hence removed and added a
leading space appropriately
(From OE-Core master rev: fb9cde0fc1a54b073edf5979f4cb7dc297b790fd)
(From OE-Core rev: 586db07af01da9d7772b7088a20886b506e09422)
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>