Vagrantfile: Don't try to create extant link
`ln` fails if the link already exists. Since 7cbc9233 (Vagrantfile: Bail
out of provisioning if anything fails) this breaks re-provisioning a VM
with `vagrant reload --provision`.
Check if /home/vagrant/lisa already exists and if it does, leave it
alone.
diff --git a/Vagrantfile b/Vagrantfile
index eef54b7..98877c4 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -26,7 +26,9 @@
sudo pip install ipython[notebook] pandas psutil wrapt
sudo apt-get remove -y w3m
- ln -s /vagrant /home/vagrant/lisa
+ if [ ! -e /home/vagrant/lisa ]; then
+ ln -s /vagrant /home/vagrant/lisa
+ fi
cd /home/vagrant/lisa
ANDROID_SDK_URL="https://dl.google.com/android/android-sdk_r24.4.1-linux.tgz"