Fixes the MSVC build.

llvm-svn: 159992
diff --git a/clang/test/Tooling/auto-detect-from-source-parent.cpp b/clang/test/Tooling/auto-detect-from-source-parent.cpp
index cb5fd563..ea7eb15 100644
--- a/clang/test/Tooling/auto-detect-from-source-parent.cpp
+++ b/clang/test/Tooling/auto-detect-from-source-parent.cpp
@@ -6,3 +6,5 @@
 
 // CHECK: C++ requires
 invalid;
+
+// REQUIRES: shell