updated ebiten version from 2.7.9 to 2.9.9

vendor/github.com/ebitengine/purego/internal/fakecgo/netbsd.go

@@ -0,0 +1,23 @@
+// Copyright 2010 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.
+
+//go:build netbsd
+
+package fakecgo
+
+import _ "unsafe" // for go:linkname
+
+// Supply environ and __progname, because we don't
+// link against the standard NetBSD crt0.o and the
+// libc dynamic library needs them.
+
+//go:linkname _environ environ
+//go:linkname _progname __progname
+//go:linkname ___ps_strings __ps_strings
+
+var (
+	_environ      uintptr
+	_progname     uintptr
+	___ps_strings uintptr
+)