mapi: add static_date offset to MaxShaderCompilerThreadsKHR

As elaborated in the next patch, there is some hidden ABI that
effectively require most entrypoints to be listed in the file.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=110302


Cc: Marek Olšák <maraeo@gmail.com>
Fixes: c5c38e83 ("mesa: implement ARB/KHR_parallel_shader_compile")
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
(cherry picked from commit 61960547)