Merge pull request swiftlang#33827 from 3405691582/LocalExternTestDsoLocal

[test][IRGen] Maybe Windows needs dso_local.

Author: xedin

test/IRGen/local_extern.swift

@@ -1,8 +1,7 @@
-// XFAIL: OS=windows-msvc
 // RUN: %target-swift-frontend -import-objc-header %S/Inputs/local_extern.h %s -emit-ir | %FileCheck %s
 // CHECK: @var = external {{(dso_local )?}}global i32
 // CHECK: @prior_var = internal global i32
-// CHECK: declare i32 @func
+// CHECK: declare {{(dso_local )?}}i32 @func
 // CHECK: define internal i32 @prior_func
 
 print("\(_no_prior_var())")