Let mpcdf_info say something about the PGI compilers

mpcdf_info.py

@@ -48,6 +48,7 @@ def do_mpcdf_info(self, subcmd, opts, *args):
     print_attribute("Default MPI", "MPCDF:default_mpi")
     print_attribute("CUDA versions", "MPCDF:cuda_modules")
     print_attribute("Default CUDA", "MPCDF:default_cuda")
+    print_attribute("PGI compilers", "MPCDF:pgi_modules")
 
     unmanaged = []