MAC 下编译 ANDROID P 源码出现下面的问题：
ninja: no work to do. [21/21] out/soong/.bootstrap/bin/soong_build out/soong/build.ninja FAILED: out/soong/build.ninja out/soong/.bootstrap/bin/soong_build -t -l out/.module_paths/Android.bp.list -b out/soong -n out -d out/soong/build.ninja.d -o out/soong/build.ninja Android.bp internal error: Could not find a supported mac sdk: ["10.10" "10.11" "10.12" "10.13"] ninja: build stopped: subcommand failed. 15:14:37 soong bootstrap failed with: exit status 1 #### failed to build some targets (13 seconds) #### ninja: no wo
