* add it to allow older distributions e.g. Ubuntu 14.04 with gcc 4.8
to build this, otherwise it fails with:
../git/gen-des-tables.c: In function 'write_table_u8':
../git/gen-des-tables.c:307:3: error: 'for' loop initial declarations are only allowed in C99 mode
for (size_t i = 0; i < m; i++)
^
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
