[cxx-interop][tests] Re-generate some of the source-kit tests.

When we import members lazily, their order changes. This should happen less (or stop happening all together) when we make member loading fully lazy (when we lazily load constructors and fix the issue with lazily loading unnamed decls) in which case we should be able to revert this commit.

In any case, the members are put back into the correct order when we lower the type for IRGen.

Author: zoecarver

test/Interop/Cxx/stdlib/fake-toolchain-module-interface.swift

@@ -3,6 +3,6 @@
 // Clang driver on Windows doesn't support -stdlib=libc++
 // XFAIL: OS=windows-msvc
 
-// CHECK: extension FakeNamespace {
+// CHECK: enum FakeNamespace {
 // CHECK:   static func foo(_ x: Int32)
 // CHECK: }