disable splicer on MSAN bot

Not sure what to do about this long term.

CQ_INCLUDE_TRYBOTS=skia.primary:Test-Ubuntu-Clang-GCE-CPU-AVX2-x86_64-Debug-MSAN

Change-Id: If9e86c285914ce2d8255ac25197845728d7c5d49
Reviewed-on: https://skia-review.googlesource.com/6842
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
1 file changed