Re-add clang-format tests to clang/test.

Also now use -strict-whitespace as the tests are confusing otherwise.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177853 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 114015b..a11b83a 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -29,7 +29,7 @@
 set(CLANG_TEST_DEPS
   clang clang-headers
   c-index-test diagtool arcmt-test c-arcmt-test
-  clang-check
+  clang-check clang-format
   )
 set(CLANG_TEST_PARAMS
   clang_site_config=${CMAKE_CURRENT_BINARY_DIR}/lit.site.cfg