Added a few missing entries in getIntegerv
Added a few missing entries in getIntegerv

A few small things could be added:
- Max Texture3D size
- Max Texture2DArray layers
- VertexArray name

Change-Id: I9e6580cefff7ea3a04b189a4c73a3ffd017453ce
Reviewed-on: https://swiftshader-review.googlesource.com/3018
Tested-by: Alexis Hétu <1c7141772178a7e80858c3db5052b328076f08f4@google.com>
Reviewed-by: Nicolas Capens <0612353e1fcebbfd4b302d9337447ca0cdfa9122@google.com>

bkaradzic/SwiftShader,bkaradzic/SwiftShader,google/swiftshader,bkaradzic/SwiftShader,bkaradzic/SwiftShader,google/swiftshader,bkaradzic/SwiftShader,google/swiftshader