Disable c-index-test on MSVC until someone figures out the real problem.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@82830 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
index 222512a..cb2aa20 100644
--- a/tools/CMakeLists.txt
+++ b/tools/CMakeLists.txt
@@ -6,4 +6,7 @@
   add_subdirectory(wpa)
 endif ()
 add_subdirectory(CIndex)
-add_subdirectory(c-index-test)
+if (MSVC)
+else ()
+   add_subdirectory(c-index-test)
+endif ()