buildpackages: support ubuntu 12.04.

Signed-off-by: Robin H. Johnson <robin.johnson@dreamhost.com>
(cherry picked from commit df5d147094281b0cb77646e529c5f1a597c72d38)

diff --git a/tasks/buildpackages/ubuntu-12.04-user-data.txt b/tasks/buildpackages/ubuntu-12.04-user-data.txt
new file mode 120000 (symlink)
index 0000000..2eb0e3c
--- /dev/null
+++ b/tasks/buildpackages/ubuntu-12.04-user-data.txt
@@ -0,0 +1 @@
+user-data.txt
\ No newline at end of file