ext/openxr: Update headers to 1.0.27
Update headers from https://github.com/KhronosGroup/OpenXR-SDK/releases/tag/release-1.0.27.
Closes: #248 (closed).
Edited by utzcoz
Update headers from https://github.com/KhronosGroup/OpenXR-SDK/releases/tag/release-1.0.27.
Closes: #248 (closed).