fdo#60698: Merge tvhlp1 into ucpchelp1

tvhlp1 just have 2 files, and this lib is used always with ucpchelp1. By
these reasons, we can merge these 2 libs.

Change-Id: I515f9c12893c986279ffac91b83879c467b091c7
Reviewed-on: https://gerrit.libreoffice.org/6820
Tested-by: LibreOffice gerrit bot <gerrit@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>