Instrumented libraries: partially fix pulseaudio build on Trusty.

BUG=414189
TBR=glider@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/689113002

Cr-Original-Commit-Position: refs/heads/master@{#302268}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 630a9ee3a52c9e4fa972438517905cb815525ad3
2 files changed