[rebranch][test] IRGen: Adjust check for new LLVM result value attribute

Match the attribute using a wildcard regex because it appears only under
-O and is irrelevant to the test.

The attribute is `range(i8 -127, -128)`. The documentation specifies
that the range can wrap, meaning that for i8 [-127, -128) is equivalent
to [-127, 127). This is correct for a function that increments a i8.

See https://llvm.org/docs/LangRef.html#parameter-attributes.

Author: AnthonyLatsis

test/IRGen/condfail_message.swift

@@ -2,7 +2,7 @@
 // RUN: %target-swift-frontend -primary-file %s -g -O -emit-ir | %FileCheck %s
 // REQUIRES: optimized_stdlib
 
-// CHECK-LABEL: define hidden swiftcc i8 @"$s16condfail_message6testitys4Int8VADF"(i8 %0)
+// CHECK-LABEL: define hidden swiftcc{{.*}} i8 @"$s16condfail_message6testitys4Int8VADF"(i8 %0)
 // CHECK: call void @llvm.trap(), !dbg [[LOC:![0-9]+]]
 
 func testit(_ a: Int8) -> Int8 {