Add USB MissleLauncher sample program

This is sample code that controls a USB missle launcher using USB host APIs

Change-Id: Ic4201faccc4562bf114c70d50b0cab6a00d28a98
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/build/sdk.atree b/build/sdk.atree
index d098400..e5da0a2 100644
--- a/build/sdk.atree
+++ b/build/sdk.atree
@@ -177,6 +177,8 @@
 development/samples/SpinnerTest                samples/${PLATFORM_NAME}/SpinnerTest
 development/samples/TicTacToeLib               samples/${PLATFORM_NAME}/TicTacToeLib
 development/samples/TicTacToeMain              samples/${PLATFORM_NAME}/TicTacToeMain
+development/samples/USB/MissileLauncher        samples/${PLATFORM_NAME}/USB/MissileLauncher
+development/samples/USB/AdbTest                samples/${PLATFORM_NAME}/USB/AdbTest
 development/samples/VoiceRecognitionService    samples/${PLATFORM_NAME}/VoiceRecognitionService
 development/samples/WeatherListWidget          samples/${PLATFORM_NAME}/WeatherListWidget
 development/apps/WidgetPreview                 samples/${PLATFORM_NAME}/WidgetPreview