scons: Fix random_r check.

Fixes: 597bddad ("scons: Test for random_r()")
Signed-off-by: Vinson Lee <vlee@freedesktop.org>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Matt Turner <mattst88@gmail.com>
13 jobs for !1517 with fix-random_r-check in 14 minutes and 17 seconds (queued for 14 seconds)
merge request