headers: Fix the order of asm() and attribute((deprecated())) in time.h

This fixes build errors with GCC, after
e5ac8c5509cd729b97065733cf4b0df0ec732797; GCC doesn't accept
__asm__(), expanded from __MINGW_ASM_CALL(), after
__attribute__((deprecated())), while Clang accepts both orders.

By default, __MINGW_ATTRIB_DEPRECATED_SEC_WARN doesn't expand
to anything, but if built with defines that makes this expand to
a deprecation attribute, the build would fail with GCC.

Signed-off-by: Martin Storsjö <martin@martin.st>
(cherry picked from commit 386fc6b04a65775883f23b5478875b022946ef10)