upload android base code part3

android/build/kati/README.md

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+kati
+====
+
+[![Build Status](https://travis-ci.org/google/kati.svg?branch=master)](http://travis-ci.org/google/kati)
+
+kati is an experimental GNU make clone.
+The main goal of this tool is to speed-up incremental build of Android.
+
+Currently, kati does not offer a faster build by itself. It instead converts
+your Makefile to a ninja file.
+
+How to use for Android
+----------------------
+
+Now AOSP has kati and ninja, so all you have to do is
+
+    % export USE_NINJA=true
+
+All Android's build commands (m, mmm, mmma, etc.) should just work.
+
+How to use for Android (deprecated way)
+----------------------
+
+Set up kati:
+
+    % cd ~/src
+    % git clone https://github.com/google/kati
+    % cd kati
+    % make
+
+Build Android:
+
+    % cd <android-directory>
+    % source build/envsetup.sh
+    % lunch <your-choice>
+    % ~/src/kati/m2n --kati_stats  # Use --goma if you are a Googler.
+    % ./ninja.sh
+
+You need ninja in your $PATH.
+
+More usage examples (deprecated way)
+-------------------
+
+### "make clean"
+
+    % ./ninja.sh -t clean
+
+Note ./ninja.sh passes all parameters to ninja.
+
+### Build a specific target
+
+For example, the following is equivalent to "make cts":
+
+    % ./ninja.sh cts
+
+Or, if you know the path you want, you can do:
+
+    % ./ninja.sh out/host/linux-x86/bin/adb