tests/bzr-definitions

rust: upgrade `rand*` crates

`test-check-cargo-lock.t` is failing for me and I was hoping this
would help. It doesn't, but we might as well take the upgrade now that
I've done the (small amount of) work for it.

Differential Revision: https://phab.mercurial-scm.org/D12000

# this file holds the definitions that are used in various bzr tests

TERM=dumb; export TERM
echo '[extensions]' >> $HGRCPATH
echo 'convert = ' >> $HGRCPATH

glog()
{
    hg log -G --template '{rev}@{branch} "{desc|firstline}" files+: [{file_adds}], files-: [{file_dels}], files: [{file_mods}]\n' "$@"
}

manifest()
{
    echo "% manifest of $2"
    hg -R $1 manifest -v -r $2
}