updated ebiten version from 2.7.9 to 2.9.9

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

@@ -1,6 +1,8 @@
 // SPDX-License-Identifier: Apache-2.0
 // SPDX-FileCopyrightText: 2022 The Ebitengine Authors
 
+//go:build !cgo
+
 package fakecgo
 
 type (
@@ -12,3 +14,7 @@ var (
 	PTHREAD_COND_INITIALIZER  = pthread_cond_t{}
 	PTHREAD_MUTEX_INITIALIZER = pthread_mutex_t{}
 )
+
+type stack_t struct {
+	/* not implemented */
+}