Add support for QNX build environment and make Linux-only functions more POSIX-like.#149

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mgorchak-blackberry wants to merge 2 commits intoKhronosGroup:mainfrom

mgorchak-blackberry:master

Commits on May 26, 2021

Add QNX build infrastructure and environment.
mgorchak-blackberry
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Make Linux variant of platform functions more generic and more POSIX-like to make them work on variety POSIX-compatible platforms.
mgorchak-blackberry
committed