flutter 运行项目时一直卡在 Running Gradle task assembleDebug
经过一段长时间编译后报错
Execution failed for task ':app:packageStageDebug'.
Several variant outputs are configured to use the same file name "resources-stageDebug.ap_", filters : MAIN:MAIN
解决方案：
终端输入 flutter clean, 然后重新 flutter pub get，再运行项目。
特此记录一下。
