Move sdk staging dir to a product-specific dir
Move sdk staging dir to a product-specific dir

So we can do incremental build across different SDK products.

Change-Id: If3f082e4b92d00e7ccda980610e1d967d44da622

xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build