clang/test/Tooling: Remark as XFAIL again in 5 tests for msvc hosts.

FIXME: JSON doesn't like path separator '\', on Win32 hosts.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@156957 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Tooling/clang-check-builtin-headers.cpp b/test/Tooling/clang-check-builtin-headers.cpp
index 4a25f39..4324dec 100644
--- a/test/Tooling/clang-check-builtin-headers.cpp
+++ b/test/Tooling/clang-check-builtin-headers.cpp
@@ -10,3 +10,6 @@
 
 // CHECK: C++ requires
 invalid;
+
+// FIXME: JSON doesn't like path separator '\', on Win32 hosts.
+// XFAIL: win32