meson: Fix compiler checks for SWR with ICC

This is a bit fragile, as the way this "fixes" the check is to move the
one that we know is correct before the one that is incorrectly reported
as working. In meson 0.49.1 (which isn't out yet) this is fixed that the
incorrect check is reported as a failure.

Fixes: e0b037d6
       ("meson: Build SWR driver")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109129


Acked-by: Eric Engestrom <eric.engestrom@intel.com>
(cherry picked from commit 7cb7f35b)