Use VAO

[lrusak]

This enables the use of vertex array objects for OpenGL/GLES

[AlwinEsch]

Hi @lrusak, tested your commit on Windows via Angle by my request #86, but it does not work, maybe as Angle only support GLES 3.0 🤔.

Comes this with it:

$ ./kodi.exe
ERR: VertexDataManager.cpp:543 (rx::VertexDataManager::storeDynamicAttrib):     ! Assert failed in rx::VertexDataManager::storeDynamicAttrib (F:\Dev\Kodi\addons\visualization\visualization.fishbmc\build\build\angle\src\angle\src\libANGLE\renderer\d3d\VertexDataManager.cpp:543): buffer || attrib.pointer
FATAL: VertexDataManager.cpp:543 (rx::VertexDataManager::storeDynamicAttrib):   ! Assert failed in rx::VertexDataManager::storeDynamicAttrib (F:\Dev\Kodi\addons\visualization\visualization.fishbmc\build\build\angle\src\angle\src\libANGLE\renderer\d3d\VertexDataManager.cpp:543): buffer || attrib.pointer
Segmentation fault         ./kodi.exe