Add suppression for ostree pthread_create issue

It seems like pthread_create allocates some tls that is not
immediately cleaned up. Suppress this for now.

Closes: #1964
Approved by: mwleeds
This commit is contained in:
Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f