vulkaninfo: update readme for Windows SDK name change
vulkaninfo: update readme for Windows SDK name change

Due to IVH's shipping their own version of vulkaninfo through
the vulkan runtime package, the vulkaninfo binary included in the
Windows Vulkan SDK was renamed to `vulkaninfoSDK.exe` to prevent
name conflicts. This commit fixes the lack of documentation in the
readme about the change

Changes to be committed:
	modified:   vulkaninfo/vulkaninfo.md

Change-Id: I7533eaa4ee5a915b36324f40a9ba4ced785710ff

KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools