[PATCH vkd3d 1/8] readme: Update build requirements.

[Sveinar Søpler]

----- On May 2, 2019, at 4:02 PM, joseph kucia joseph.kucia at gmail.com wrote:

> -Vkd3d depends on SPIRV-Headers and Vulkan-Headers (>= 1.1.88).
> +Vkd3d depends on SPIRV-Headers and Vulkan-Headers (>= 1.1.101).

Technically the SPIRV-Headers should be (>= 1.3.80), since anything
near (>=1.1...) is from 2017.
I could not get vulkan-headers to build without upgrading SPIRV-headers
to 1.3.80 (ish), and LunarG has 1.3.80 in their Vulkan 1.1.106 repo.

Just in case someone builds from GIT or something, it COULD be confusing
requiring SPIRV-Headers 1.1.106? :)

Sveinar