Add CUDA include dir so cuda.h is found; also add CUDA library dir to mimic…

theano/sandbox/cuda/dnn.py

@@ -44,7 +44,9 @@ if ((err = cudnnCreate(&_handle)) != CUDNN_STATUS_SUCCESS) {
 """
 
             comp, run, out, err = gof.cmodule.GCC_compiler.try_flags(
-                ["-l", "cudnn", "-I" + os.path.dirname(__file__)],
+                ["-l", "cudnn", "-I" + os.path.dirname(__file__),
+                 "-I" + os.path.join(theano.config.cuda.root, 'include'),
+                 "-L" + os.path.join(theano.config.cuda.root, 'lib64')],
                 preambule=preambule, body=body,
                 try_run=True, output=True)