Bug#836608: qtcreator: Please use llvm 3.8 or, better, 3.9

[Sylvestre Ledru <sylvestre@debian.org>]

Source: qtcreator
Severity: important
Control: block 836604 by -1

Hello,

This package depends on llvm-toolchain-3.6.

To limit the number of llvm versions in the next Debian stable, we
would like all packages using/depending llvm/clang/lldb to move to version
3.8 or 3.9 so that we can remove LLVM 3.5, 3.6 and 3.7 from the Debian archive.

This package also blocks the transition to llvm 3.8
https://release.debian.org/transitions/html/llvm-defaults-3.8.html

Thanks,
Sylvestre