Adding android-ndk (r3) formula

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

* Don't run UI tool after install.

Formula/android-ndk.rb

@@ -0,0 +1,30 @@
+require 'formula'
+
+class AndroidNdk <Formula
+  url 'http://dl.google.com/android/ndk/android-ndk-r3-darwin-x86.zip'
+  homepage 'http://developer.android.com/index.html'
+  md5 'a083ccc36aa9a3a35404861e7d51d1ae'
+  version 'r3'
+
+  depends_on 'android-sdk'
+
+  def install
+    prefix.install Dir['*']
+    prefix.cd { system("./build/host-setup.sh") }
+  end
+
+  def caveats; <<-EOS
+We agreed to the Android NDK License Agreement for you by downloading the NDK.
+If this is unacceptable you should uninstall.
+
+License information at:
+http://developer.android.com/sdk/terms.html
+
+Software and System requirements at:
+http://developer.android.com/sdk/ndk/1.6_r1/index.html#requirements
+
+For more documentation on Android NDK, please check:
+  #{prefix}/docs
+EOS
+  end
+end