Setting opencl-external-clang-headers to enabled while using shared LLVM
was broken and this option was mostly used for windows to force static
inclusion of opencl base headers.
Simply relying on the shared-llvm option here is enough to get what we
want.
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25568>
Karol Herbst
37a1346347