wincred: use go build constraint

crazy-max · crazy-max · commit 90bf5da1c936 · 2023-05-29T12:02:48.000+02:00
Signed-off-by: CrazyMax &lt;crazy-max@users.noreply.github.com&gt;
diff --git a/wincred/cmd/main.go b/wincred/cmd/main.go
@@ -1,3 +1,5 @@
+//go:build windows
+
 package main
 
 import (
diff --git a/wincred/wincred.go b/wincred/wincred.go
@@ -1,3 +1,5 @@
+//go:build windows
+
 package wincred
 
 import (
diff --git a/wincred/wincred_test.go b/wincred/wincred_test.go
@@ -1,3 +1,5 @@
+//go:build windows
+
 package wincred
 
 import (
