util/u_queue: include missing time.h
This file uses timespec_get() which is defined in include/c11/threads_posix.h for systems that don't exposes that function but it's missing for other ones. On MacOS this appears to fail to compile.
Signed-off-by: Lionel Landwerlin lionel.g.landwerlin@intel.com Gitlab: #1020 (closed) Fixes: e2d761de ("util: drop final reference to p_compiler.h")