configure.ac: add llvm inteljitevents component if enabled

Needed to successfully link llvmpipe or swr when using shared llvm libs
built with inteljitevents enabled.

v2: Make adding inteljitevents component global rather than just
llvmpipe/swr, since libgallium will have a symbol dependency.

Cc: <mesa-stable@lists.freedesktop.org>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
1 file changed