native-keymap and keytar are only used in the electron process,
so we don't need them. This allows us to drop our dependencies on
libx11-dev, libxkbfile-dev, and libsecret-dev.
We only want to use an old version for glibc which the centos:7
image takes care of.
The old version of git used in debian:8 was causing problems
with the uid/gid passthrough with no user in passwd.
