[rebranch][test] IRGen: Adjust FileCheck regex for captures(none)

The current regex does not match a ')' inside the argument list. This
no longer works because `nocapture` became `captures(none) in
29441e4f5fa5f5c7709f7cf180815ba97f611297 (llvm-project). Use a wildcard
regex instead. This is fine because the `unnamed_addr` attribute the
test is guarding against can only appear after the argument list.

Author: AnthonyLatsis

test/IRGen/objc_function_merge.swift

@@ -43,9 +43,9 @@ class Derived : Base {
 
 
 // Check if the objc methods are not generated with the unnamed_addr attribute.
-// CHECK-IR-DAG: define {{.*}} @"$s4test4BaseC20supportsSecureCodingSbvgZTo"({{[^\)]*}}) #{{[0-9]+}} {
-// CHECK-IR-DAG: define {{.*}} @"$s4test4BaseC6encode4withySo7NSCoderC_tFTo"({{[^\)]*}}) #{{[0-9]+}} {
-// CHECK-IR-DAG: define {{.*}} @"$s4test7DerivedC20supportsSecureCodingSbvgZTo"({{[^\)]*}}) #{{[0-9]+}} {
+// CHECK-IR-DAG: define {{.*}} @"$s4test4BaseC20supportsSecureCodingSbvgZTo"({{.*}}) #{{[0-9]+}} {
+// CHECK-IR-DAG: define {{.*}} @"$s4test4BaseC6encode4withySo7NSCoderC_tFTo"({{.*}}) #{{[0-9]+}} {
+// CHECK-IR-DAG: define {{.*}} @"$s4test7DerivedC20supportsSecureCodingSbvgZTo"({{.*}}) #{{[0-9]+}} {
 
 let d = Derived(s: "")
 if #available(macOS 10.13, iOS 11, tvOS 11, watchOS 4, *) {