Use an Itanium triple in DWARF debug info tests

This should fix the clang part of the breakage in r200340.

llvm-svn: 200435
diff --git a/clang/test/CodeGenCXX/debug-info-byval.cpp b/clang/test/CodeGenCXX/debug-info-byval.cpp
index e6317fc..5b0850b 100644
--- a/clang/test/CodeGenCXX/debug-info-byval.cpp
+++ b/clang/test/CodeGenCXX/debug-info-byval.cpp
@@ -1,4 +1,5 @@
-// RUN: %clang -g -S %s -o - | FileCheck %s
+// FIXME: Check IR rather than asm, then triple is not needed.
+// RUN: %clang -Xclang -triple=%itanium_abi_triple -g -S %s -o - | FileCheck %s
 // Test to check presence of debug info for byval parameter.
 // Radar 8350436.
 class DAG {