Otherwise some pre-init components can start it, and threads get
stranded in the forkit process causing grief.

Change-Id: Ib1846f8b329b4c6b84645999dafba1252c5129c7
Reviewed-on: https://gerrit.libreoffice.org/57631
Tested-by: Jenkins
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>