Simplify the Makefile a bit.
Simplify the Makefile a bit.

llvm-config --cxxflags provides the include dirs, so we don't need them manually

eliben/llvm-clang-samples,eliben/llvm-clang-samples,eliben/llvm-clang-samples,eliben/llvm-clang-samples,eliben/llvm-clang-samples,eliben/llvm-clang-samples