Update com.android.tools.build from 0.4.2 to 0.5.2
:core ResourceManager#load now requires scheme in URI.

An illegalArgumentException gets thrown unless it is there. Previously
it would just fall through and cause a NullPointerException.
Fix unable to initialize GpuProgram.

It was calling link() before marking itself initialized, causing it to
fail as it checks too.
Stub out a Sprite and VertexBuffer class.
A little more code for the VBO stub.