benchmarks/vkmark: unbreak on non-x86 after bfcd0e437af3

> vkmark-2017.08.24 depends on file: /usr/local/include/vulkan/vulkan_intel.h - not found

• Error code 1

PR: 255887
Reported by: linimon

(cherry picked from commit 156537c43a62e8c700865d183cc9f14838ac6fbc)