Fix CircleCI build#7160

Merged

dlang-bot merged 3 commits intomasterfrom

upgrade-circle-ci

Aug 29, 2019

Commits on Aug 29, 2019

[CircleCI] Upgrade host dmd version from 2.078.1 to 2.079.1
PetarKirov
authored
[circleci] Fix building dmd - use dmd/src/build.d instead of dmd/src/posix.mak
PetarKirov
committed
[circleci]: Merge the 'Install gdb' step into .circleci/run.sh install_deps
PetarKirov
committed