allow optional signext attribute

Allow the tests to succeed with tne signext (or other) attribute is present.  The attributes
show up for Power, but not for x86*, so need to be appropriately wildcarded.

llvm-svn: 210050
diff --git a/clang/test/Modules/cxx-irgen.cpp b/clang/test/Modules/cxx-irgen.cpp
index 7c680f8..4c61a3a 100644
--- a/clang/test/Modules/cxx-irgen.cpp
+++ b/clang/test/Modules/cxx-irgen.cpp
@@ -4,7 +4,7 @@
 
 @import cxx_irgen_top;
 
-// CHECK-DAG: call i32 @_ZN8CtorInitIiE1fEv(
+// CHECK-DAG: call {{[a-z]*[ ]?i32}} @_ZN8CtorInitIiE1fEv(
 CtorInit<int> x;
 
 @import cxx_irgen_left;