!392 3.0分支修改giflib依赖、添加宏代码

Merge pull request !392 from 郝烁/OpenHarmony-3.0-LTS

config/subsystem/graphic/config.gni

@@ -17,4 +17,5 @@ declare_args() {
   enable_graphic_font = false
   enable_graphic_dualcore = false
   enable_video_component = false
+  enable_graphic_gif = true
 }