[vxl] Update to VXL v1.18.0#4711

Merged

alexkaratarakis merged 3 commits intomicrosoft:masterfrom

UnaNancyOwen:fix_vxl

Nov 15, 2018

Commits on Nov 12, 2018

[vxl] Update to VXL v1.18.0
UnaNancyOwen
committed

Commits on Nov 14, 2018

Merge branch 'master' of https://github.com/Microsoft/vcpkg into dev/roschuma/4711
ras0219-msft
committed
[vxl] Slight cleanup -- use VCPKG_CMAKE_SYSTEM_NAME to determine target instead of WIN32
ras0219-msft
committed