Rework docker setup to make it easier to work around bugs on buildbots

llvm-svn: 349234
diff --git a/libcxx/utils/docker/scripts/docker_start_buildbots.sh b/libcxx/utils/docker/scripts/docker_start_buildbots.sh
new file mode 100755
index 0000000..1da3942
--- /dev/null
+++ b/libcxx/utils/docker/scripts/docker_start_buildbots.sh
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+set -x
+
+# Update the libc++ sources in the image in order to use the most recent version of
+# run_buildbots.sh
+cd /libcxx
+git pull
+source utils/docker/scripts/run_buildbots.sh "$@"
diff --git a/libcxx/utils/docker/scripts/run_buildbot.sh b/libcxx/utils/docker/scripts/run_buildbot.sh
index 10cc09b..45f5a1c 100755
--- a/libcxx/utils/docker/scripts/run_buildbot.sh
+++ b/libcxx/utils/docker/scripts/run_buildbot.sh
@@ -12,6 +12,13 @@
 apt-get update -y
 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
+rm /usr/bin/ld
+ln -s /usr/bin/lld-8 /usr/bin/ld
+
 systemctl set-property buildslave.service TasksMax=100000
 
 buildslave stop $BOT_DIR