#i125003# add gtest dependency to soltools

the dmake build environment needs to be functional before such an external
module can be unpacked, built, delivered, checked, etc. Adding a dependency to
the solenv module could suffice already but current and future build recipes
might also expect stuff from the soltool module such as mkdepend or checkdll.


git-svn-id: https://svn.apache.org/repos/asf/openoffice/trunk@1599462 13f79535-47bb-0310-9956-ffa450edef68