Finish up the gettext handling in CMake. The included functions in CMake only
take care of finding the gettext tools, not the headers and libraries needed
to build things. Use the licq project as inspiration on how to solve this.
git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4389 3789f03b-4d11-0410-bbf8-ca57d06f2519