[build] Add ubsan blacklist file

The blacklist is needed to make compilation work.

TBR=sergiyb@chromium.org
NOTRY=true

Bug: chromium:853202
Change-Id: Ie867b3605a42ddbcf02514965652ff89121be14d
Reviewed-on: https://chromium-review.googlesource.com/1105830Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53832}

tools/ubsan/blacklist.txt

+#############################################################################
+# UBSan blacklist.
\ No newline at end of file