Add `VK_KHR_timeline_semaphore` extension support#276

Merged

MaikKlein merged 8 commits intoash-rs:masterfrom zedrian:khr_timeline_semaphore

Mar 22, 2020

+89

Commits on Mar 16, 2020

Commits on Mar 17, 2020

TimelineSemaphore extension object now provides functions for work with timeline semaphores.
zedrian
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