Various fixes for icon theme link files.
Various fixes for icon theme link files.

Don't package icons we have links for instead.
Also check that links don't point to themselves or other links.
Also warn if we have links to files that are not mentioned in the
filelists. Also check that links have targets packed and warn if not.

Change-Id: I9e69340432b7289e49c854fecd4944ae459acc75

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core