Fix all the bots.

The buildbot start scripts hardcode the version string.
Bump it from 8 to 9.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@351638 91177308-0d34-0410-b5e6-96231b3b80d8

utils/docker/scripts/run_buildbot.sh

@@ -15,9 +15,9 @@ apt-get upgrade -y
 # FIXME(EricWF): Remove this hack. It's only in place to temporarily fix linking libclang_rt from the
 # debian packages.
 # WARNING: If you're not a buildbot, DO NOT RUN!
-apt-get install lld-8
+apt-get install lld-9
 rm /usr/bin/ld
-ln -s /usr/bin/lld-8 /usr/bin/ld
+ln -s /usr/bin/lld-9 /usr/bin/ld
 
 systemctl set-property buildslave.service TasksMax=100000
 
@@ -59,4 +59,4 @@ grep "slave is ready" $BOT_DIR/twistd.log || shutdown now
 # Gracefully restart before that happen.
 sleep 72000
 while pkill -SIGHUP buildslave; do sleep 5; done;
-shutdown now
+shutdown now