configure: Trust LLVM >= 4.0 llvm-config --libs for shared libraries

No need to manually look for the library files anymore with current
LLVM. This sidesteps the manual method failing when LLVM was built with
-DLLVM_APPEND_VC_REV=ON.

(This might already work with older versions of LLVM)

Acked-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
1 file changed