stray c++11 ud suffix fixes for tcmalloc files

Followup to https://codereview.chromium.org/21157004 - here are a few
more warnings that we can silence.

BUG=263960

Review URL: https://codereview.chromium.org/1253873003

Cr-Original-Commit-Position: refs/heads/master@{#340357}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 5e17dd65b9bee51dc12bba6d3c5df99e14bf3f85
2 files changed
tree: 570abae5d4b97f17ea5a20656bbe4057f58a7b25
  1. src/