Added $(XCOMPILER) for -fopenmp and -L/usr/local/cuda/lib to CUDA_LIB on Mac
Added $(XCOMPILER) for -fopenmp and -L/usr/local/cuda/lib to CUDA_LIB on Mac

mfem/mfem,mfem/mfem,mfem/mfem,mfem/mfem,mfem/mfem