Roll usrsctplib: e6e1833:8975bd5

Syncs to tip of tree to bring in fix for memory leak detected by LSan
and locally in memcheck on WebRTC code. Fixes were in usrsctplib
r8988-r8990.

[email protected]
BUG=

Review URL: https://codereview.chromium.org/550023002

Cr-Commit-Position: refs/heads/master@{#293681}
1 file changed