wire: respect -record flag for tests (google/go-cloud#282)

Fixes google/go-cloud#281

internal/wire/testdata/NamingWorstCase/want/wire_gen.go

@@ -0,0 +1,20 @@
+// Code generated by Wire. DO NOT EDIT.
+
+//go:generate wire
+//+build !wireinject
+
+package main
+
+import (
+	context2 "context"
+)
+
+// Injectors from wire.go:
+
+func inject(context3 context2.Context, err2 struct{}) (context, error) {
+	context4, err := provide(context3)
+	if err != nil {
+		return context{}, err
+	}
+	return context4, nil
+}