arb_gpu_shader_int64: int64 extension requires GL4
Per the spec (https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_gpu_shader_int64.txt):
OpenGL 4.0 and GLSL 4.00 are required.
Same as !632 (merged) but for int64.
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Per the spec (https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_gpu_shader_int64.txt):
OpenGL 4.0 and GLSL 4.00 are required.
Same as !632 (merged) but for int64.