Add missing x86 requirement.

llvm-svn: 293210
diff --git a/clang/test/CodeGen/thinlto-multi-module.ll b/clang/test/CodeGen/thinlto-multi-module.ll
index 072c473..21d28cf 100644
--- a/clang/test/CodeGen/thinlto-multi-module.ll
+++ b/clang/test/CodeGen/thinlto-multi-module.ll
@@ -1,3 +1,5 @@
+; REQUIRES: x86-registered-target
+
 ; RUN: opt -module-summary -o %t1.o %s
 ; RUN: llvm-lto -thinlto -o %t %t1.o