Updated core

Project: help  6f19c099aa6852d0ec0570d9f56281e7f7032f81

Add script to check for broken image references

Such may appear if images are moved around in the
icon theme directories or between the icon themes
and the helpcontent2 repo.
Simple typos are also possible.

Change-Id: Iafee73efe9776ebf8ae74919c90644570593d94e
Reviewed-on: https://gerrit.libreoffice.org/32264Reviewed-by: Olivier Hallot <olivier.hallot@edx.srv.br>
Tested-by: Olivier Hallot <olivier.hallot@edx.srv.br>

helpcontent2 @ 6f19c099

-Subproject commit 447e7d65d59935724657e59b7f9f8bf312c6dce8
+Subproject commit 6f19c099aa6852d0ec0570d9f56281e7f7032f81