Bug#924012: starpu build-depends on GCC 7

[Matthias Klose]

Source: starpu
Version: 1.2.6+dfsg-7
Severity: important
Tags: sid buster
User: debian-...@lists.debian.org
Usertags: gcc-7-rm

starpu build-depends on GCC 7. Please switch to GCC 8, so that buster
doesn't need to ship with GCC 7.