Roll Vulkan-Loader to a835880
Roll Vulkan-Loader to a835880

Changelist:
https://chromium.googlesource.com/external/github.com/KhronosGroup/Vulkan-Loader/+log/da58202e9569eff53560b4c3a007de2297be40d2..a8358804f3c5b4e284d5e9a88b232309bb3c333d

BUG=chromium:427584

Change-Id: I758d2ba05aa731b07e5d336a6ebab45a4837e142
Reviewed-on: https://chromium-review.googlesource.com/1152356
Reviewed-by: Corentin Wallez <470c533e86f4f848c98c7e11fffc2d043494a401@chromium.org>
Commit-Queue: Corentin Wallez <470c533e86f4f848c98c7e11fffc2d043494a401@chromium.org>

ppy/angle,ppy/angle,ppy/angle,ppy/angle