[PATCH] blktests: include cgroup in rc

I added the cgroup cleanup code to the main loop, but didn't test any
other test so I didn't notice it'll error out if we haven't included the
cgroup helpers.  Do this so the cleanup can happen appropriately.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
 common/rc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/common/rc b/common/rc
index 723b5b02a065..153a32358519 100644
--- a/common/rc
+++ b/common/rc

@@ -9,6 +9,7 @@ shopt -s extglob
 . common/shellcheck
 # Include fio helpers by default.
 . common/fio
+. common/cgroup
 
 # If a test runs multiple "subtests", then each subtest should typically run
 # for TIMEOUT / number of subtests.

-- 
2.14.3