Bug#884541: llvm-toolchain-3.9: do not release with buster

[Gianfranco Costamagna]

Hello Sylvestre

>OK, once it is time, I will probably do like 3.7 (only build llvm and
>just for arm).


I really think in a month or two ghc will move to llvm 5.0, so probably not worth the effort
(also, llvm 3.9 has other reverse-deps right now)
# Broken Depends:
ghc: ghc [arm64 armel armhf]
ycmd: ycmd [amd64 arm64 armhf i386 mips mips64el mipsel ppc64el s390x]

G.