[build] Fix ubsan compilation

This copies a necessary suppression from Chromium's blacklist.

NOTRY=true
TBR=ishell@chromium.org

Bug: chromium:726584
Change-Id: I7dfa13ad4a929b28bccb782be0a0faa9d29be1eb
Reviewed-on: https://chromium-review.googlesource.com/576001Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46767}

tools/ubsan/vptr_blacklist.txt

@@ -4,3 +4,9 @@
 # tricky to represent C++ types. For now, any possible changes by name manglings
 # are simply represented as wildcard expressions of regexp, and thus it might be
 # over-blacklisted.
+
+#############################################################################
+# UBsan goes into an infinite recursion when __dynamic_cast instrumented with
+# "vptr". See crbug.com/609786.
+
+src:*/third_party/libc\+\+abi/trunk/src/private_typeinfo.cpp