Bug#982799: RM: tilix [armel armhf] -- RoQA; current version does not build with gdc 10

[Adrian Bunk]

Package: ftp.debian.org
Severity: normal

D language support (package default-d-compiler) is provided
by ldc where available, and by gdc elsewhere.

tilix now uses functionality not (yet) supported by gdc,
see #966249 for background.