cmake OpenGLES3 examples

facebookresearch/habitat-sim src/cmake/FindMagnum.cmake :1075 

find_package(OpenGLES3 REQUIRED)

harfang3d/harfang3d extern/bgfx/bgfx.cmake :107 

find_package(OpenGLES3)

alex-petrenko/megaverse src/cmake/modules/FindMagnum.cmake :829 

find_package(OpenGLES3 REQUIRED)

mosra/magnum-plugins modules/FindMagnum.cmake :1075 

find_package(OpenGLES3 REQUIRED)

liballeg/allegro5 CMakeLists.txt :665 

find_package(OpenGLES3)