llvm dev - Oct 2019 - Zorg migration to GitHub/monorepo - Step 2

Hello everyone,

As all of you know, the migration to github monorepo is done.

The production master is currently working in a transition mode, when
it supports both, bots already working with github, and bots still
working with SVN.

Today we will turn "github only" mode for the production master.

Those builders which depend on ported build factories and were staged are good.

The builders which depend on ported build factories and have not been
staged might just work after this change. Those which turn red will be
temporarily removed from the production master. If you are an owner of
such builder, please feel free to stage it, make it green in staging,
and then you could bring it to the production build bot.

The builders which still require SVN to build will be removed form the
production master. If you are an owner of such builder, please feel
free to stage it, port it to work with the github monorepo, make it
green, and then you could bring it to the production build bot.

Here is the list of not yet staged builders of the last 2 kinds in the
alphabetical order:

aosp-O3-polly-before-vectorizer-unprofitable
clang-aarch64-linux-build-cache
clang-armv7-linux-build-cache
clang-atom-d525-fedora-rel
clang-cmake-x86_64-avx2-linux
clang-cmake-x86_64-avx2-linux-perf
clang-cmake-x86_64-sde-avx512-linux
clang-cuda-build
clang-hexagon-elf
clang-s390x-linux
clang-s390x-linux-lnt
clang-s390x-linux-multistage
clang-x64-ninja-win7
libcxx-libcxxabi-libunwind-x86_64-linux-ubuntu
libcxx-libcxxabi-x86_64-linux-ubuntu-32bit
libcxx-libcxxabi-x86_64-linux-ubuntu-asan
libcxx-libcxxabi-x86_64-linux-ubuntu-cxx03
libcxx-libcxxabi-x86_64-linux-ubuntu-cxx11
libcxx-libcxxabi-x86_64-linux-ubuntu-cxx14
libcxx-libcxxabi-x86_64-linux-ubuntu-cxx17
libcxx-libcxxabi-x86_64-linux-ubuntu-cxx2a
libcxx-libcxxabi-x86_64-linux-ubuntu-gcc5-cxx11
libcxx-libcxxabi-x86_64-linux-ubuntu-gcc-tot-latest-std
libcxx-libcxxabi-x86_64-linux-ubuntu-msan
libcxx-libcxxabi-x86_64-linux-ubuntu-tsan
libcxx-libcxxabi-x86_64-linux-ubuntu-ubsan
llvm-hexagon-elf
polly-amd64-linux
polly-arm-linux
reverse-iteration

Please let me know if you have any questions.

Thank you for your patience and understanding.

Galina