Enhance shader debug output

glGetTranslatedShaderSourceANGLE() returns the glsl code, the initial translated hlsl code,
the final translated hlsl code and the disassembly of the generated binary with the compiler configuration.
This enhancement is only available if the define ANGLE_GENERATE_SHADER_DEBUG_INFO exists.
This define is set in the debug configurations for the Windows platform.

BUG=angle:751

Change-Id: I8b15e8b25fbb0c0575a73cc876bf8f1fa7ed142a
Reviewed-on: https://chromium-review.googlesource.com/221059
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>