[test] Test fix for platforms like s390x

Author: levivic

test/IRGen/clang_inline_opt.swift

@@ -7,7 +7,7 @@ func return10() -> UInt32 {
 // Sanity check that we tell Clang to generate optimizable code when
 // we're optimizing.
 
-// CHECK: define internal i32 @return7() [[CLANG_ATTRS:#[0-9]+]] {
+// CHECK: define internal{{( zeroext)?}} i32 @return7() [[CLANG_ATTRS:#[0-9]+]] {
 
 // CHECK: attributes [[CLANG_ATTRS]] = {
 // CHECK-NOT: noinline