加快Androd 编译！

【2021-09-08】

使用方法
./prebuilts/build-tools/linux-x86/bin/ninja -f out/combined-xxx.ninja 相当于make，xxx为对应的lunch项，
示例
编译Settings
./prebuilts/build-tools/linux-x86/bin/ninja -f out/combined-xxx.ninja Settings -j32
编译selinux
./prebuilts/build-tools/linux-x86/bin/ninja -f out/combined-xxx.ninja selinux_policy -j32
编译Framework
./prebuilts/build-tools/linux-x86/bin/ninja -f out/combined-xxx.ninja framework -j32
全编译
./prebuilts/build-tools/linux-x86/bin/ninja -f out/combined-xxx.ninja -j32 2>&1 |tee ninja_build.log

WIFI-service

./prebuilts/build-tools/linux-x86/bin/ninja -f out/combined-xxx.ninja com.android.wifi -j16