Update blacklist for Iris 540 Vulkan to exclude new test

This test is very similar to the existing WritePixels_Gpu test, which
was blacklisted for failing in the same way.

Bug: skia:
Change-Id: Id8e4253e030e01e215f161f81969764bc8364352
Reviewed-on: https://skia-review.googlesource.com/13809
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
2 files changed