[HIPIFY] option cuda-path might be used with '--' as well as with a single dash: '-'

+ Update README.md

hipify-clang/README.md

@@ -320,9 +320,9 @@ For example:
 ```shell
 ./hipify-clang \
   square.cu \
-  -- \
   --cuda-path=/usr/local/cuda-8.0 \
-  -isystem /usr/local/cuda-8.0/samples/common/inc
+  -- \
+  -I /usr/local/cuda-8.0/samples/common/inc
 ```
 
 `hipify-clang` arguments are given first, followed by a separator, and then the arguments you'd pass to `clang` if you

tests/hipify-clang/lit.cfg

@@ -75,7 +75,7 @@ else:
     clang_arguments += " -isystem'%s'/samples/common/inc"
 clang_arguments += " -I'%s'/include"
 
-hipify_arguments = "-cuda-path='%s'"
+hipify_arguments = "--cuda-path='%s'"
 
 config.substitutions.append(("%clang_args", clang_arguments % (config.cuda_sdk_root, config.cuda_dnn_root)))
 config.substitutions.append(("%hipify_args", hipify_arguments % (config.cuda_root)))