VertexRoutineFuzzer: Add code able to compile a simple shader
VertexRoutineFuzzer: Add code able to compile a simple shader

The fuzzer still needs to parse state and source from `data` before it
can actually be useful.

Bug swiftshader:86

Change-Id: Iafcbce4748b83a4fb9f829e3e8a473d161d3a696
Reviewed-on: https://swiftshader-review.googlesource.com/13249
Reviewed-by: Nicolas Capens <51edc787c30f24c4904e8ffbb5523c3a9f7a451d@google.com>
Tested-by: Nicolas Capens <51edc787c30f24c4904e8ffbb5523c3a9f7a451d@google.com>

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