Merge branch 'jbolz_ubo_align' into 'master'

Fix 'ubo' tests to lay out data satisfying the min ubo alignment

Fixes #114.

I didn't see any way to get the alignment during the init() function, so I just made a copy of it before download.

See merge request !205

diff --cc external/vulkancts/modules/vulkan/ubo/vktUniformBlockCase.cpp
Simple merge