Initialize dbgLogLen before calling glGetProgramInfoLog.

Crash on PPAPI if call glGetProgramInfoLog() with an uninitialized params.
Regal::helper::getInfoLog for accessing various GL info logs.
Add regaltest test coverage for Regal::helper::size::get
Eliminate global/static data in RegalIff.cpp
GL_VERSION_1_2 enums that GLEW missed out on: GL_MAX_ELEMENTS_VERTICES, GL_MAX_ELEMENTS_INDICES
Add GL_SGIS_detail_texture enums to gl.py
Add GL_ARB_viewport_array enums to gl.py
Regal::Config string variables for code generation dispatch layers.
For RegalDispatchCode - name shader and program return variables, rather than generic o output.
Add extra cast through void* to avoid -Wcast-align warning
Fixups for glShaderSource support in RegalDispatchCode