This older code needs specific compiler options to allow it to work
with gcc 5. These options are used in the 2.21 recipe in master/fido
so this simply backports them.
(From OE-Core rev: 447dba2a6a077c83083556ab79ab265d4b8a048f)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>