Update CUDNN home

Author: pvijayakrish

tools/gen_ort_dockerfile.py

@@ -579,7 +579,7 @@ def preprocess_gpu_flags():
             #     version = m.group(1)
             if FLAGS.cudnn_home is None:
                 #FLAGS.cudnn_home = "/usr/local/cudnn-{}/cuda".format(version)
-                FLAGS.cudnn_home = "/usr/include"
+                FLAGS.cudnn_home = "/usr"
                 #FLAGS.cudnn_home = "/usr/lib/x86_64-linux-gnu/"
 
         if FLAGS.cuda_home is None: