go/analysis/passes/reflectvaluecompare/cmd/reflectvaluecompare: add main.go

This makes it easier to play with.

Updates golang/go#71732

Change-Id: If5ec810c051b0c12ec30891c9a431cc5ca06dcd9
Reviewed-on: https://go-review.googlesource.com/c/tools/+/649615
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

Author: adonovan

go/analysis/passes/reflectvaluecompare/cmd/reflectvaluecompare/main.go

@@ -0,0 +1,18 @@
+// Copyright 2025 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// The reflectvaluecompare command applies the reflectvaluecompare
+// checker to the specified packages of Go source code.
+//
+// Run with:
+//
+//	$ go run ./go/analysis/passes/reflectvaluecompare/cmd/reflectvaluecompare -- packages...
+package main
+
+import (
+	"golang.org/x/tools/go/analysis/passes/reflectvaluecompare"
+	"golang.org/x/tools/go/analysis/singlechecker"
+)
+
+func main() { singlechecker.Main(reflectvaluecompare.Analyzer) }