clang/win plugin: Do not warn on dllexport inline move constructors.

tools/clang/plugins/tests/test.sh

Index: tools/clang/plugins/tests/test.sh
diff --git a/tools/clang/plugins/tests/test.sh b/tools/clang/plugins/tests/test.sh
index cf262522eb855e291b8f769638bcddce0e9f7114..61bee99f82f229c44a58696e0c9537450ec11a81 100755
--- a/tools/clang/plugins/tests/test.sh
+++ b/tools/clang/plugins/tests/test.sh
@@ -31,8 +31,12 @@ do_testcase() {
     flags="$(cat "${3}")"
   fi
 
-  if [ "$(uname -s)" = "Darwin" ]; then
-    flags="${flags} -isysroot $(xcrun --show-sdk-path) -stdlib=libstdc++"
+  # TODO(thakis): Remove once the tests are standalone, http://crbug.com/486559
+  if [[ "$(uname -s)" == "Darwin" ]]; then
+    flags="${flags} -isysroot $(xcrun --show-sdk-path)"
+  fi
+  if [[ "$(uname -s)" == "Darwin" && "${flags}" != *-target* ]]; then
+    flags="${flags} -stdlib=libstdc++"
   fi
 
   flags="${flags} -Xclang -plugin-arg-find-bad-constructs \