clang/test/Index/code-completion-skip-bodies.cpp: Add XFAIL while investigating.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167188 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Index/code-completion-skip-bodies.cpp b/test/Index/code-completion-skip-bodies.cpp
index e6aa458..67b2196 100644
--- a/test/Index/code-completion-skip-bodies.cpp
+++ b/test/Index/code-completion-skip-bodies.cpp
@@ -15,3 +15,6 @@
 // CHECK-NOT: error: use of undeclared identifier 'undeclared1'
 // CHECK: error: use of undeclared identifier 'undeclared2'
 // CHECK: FieldDecl:{ResultType int}{TypedText x}
+
+// FIXME: Investigating
+// XFAIL: cygwin,mingw32,win32