Merged GL Api Loader fixes from USD

Merged recent bug fixes from the USD implementation of the
GL Api Loader. This fixes the OpenGL system framework path on
macOS and also improves GL version and GL extension processing.
This commit is contained in:
David G Yu 2021-02-03 10:17:36 -08:00
parent 62ddd17bcb
commit 33a3d3bc87

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