Considering that PORTDIR may be removed in a future EAPI, please consider finding a new solution to the ebuild's problem. Preferably other than copying the file to FILESDIR...
BTW doesn't .tbz2 metadata include the license in an acceptable manner?
(alternatively, we could probably go with RESTRICT=bindist)
+ 29 Mar 2015; Ben de Groot <firstname.lastname@example.org> +corefonts-1-r7.ebuild,
+ -corefonts-1-r5.ebuild, corefonts-1-r6.ebuild, metadata.xml:
+ Add Tahoma optionally. Include shipped EULA (bug #416735).