EmuGL: capture VBO contents in GL2Encoder

The glBufferData, glBufferSubData, and glDeleteBuffers entry points
had interception routines in GL2Encoder which cache the data, but they
weren't hooked up. So when glDrawElements tried to retrieve the cached
data it wasn't there.

Change-Id: Iaed11fccaefab3186485be53a0f15c8ca0a255f9
1 file changed