Fix test case.

The specific problem was that the AST was looking for Actor/AnyActor in
_Concurrency... but I named the module of the test borrowing (for some reason).
So the machinery was failing to think that my stubbed out protocols where the
true known protocols. By changing the module name to _Concurrency, everything
worked out.

Author: gottesmm

test/SIL/Serialization/isolated_parameters.sil

@@ -1,7 +1,7 @@
 // RUN: %empty-directory(%t)
-// RUN: %target-sil-opt %s -emit-sib -o %t/tmp.sib -module-name borrow
-// RUN: %target-sil-opt %t/tmp.sib -o %t/tmp.2.sib -module-name borrow
-// RUN: %target-sil-opt %t/tmp.2.sib -module-name borrow -emit-sorted-sil | %FileCheck %s
+// RUN: %target-sil-opt %s -emit-sib -o %t/tmp.sib -module-name _Concurrency
+// RUN: %target-sil-opt %t/tmp.sib -o %t/tmp.2.sib -module-name _Concurrency
+// RUN: %target-sil-opt %t/tmp.2.sib -module-name _Concurrency -emit-sorted-sil | %FileCheck %s
 
 // REQUIRES: asserts
 // REQUIRES: concurrency
@@ -13,6 +13,7 @@ import Swift
 import SwiftShims
 
 // NOTE: In SIL we do not save/print out imports, so we cannot import _Concurrency here!
+
 public protocol AnyActor: AnyObject, Sendable {}
 public protocol Actor : AnyActor {}