add bash to restricted su

Change-Id: I3130218397f5a2fcb04132debe252dc955d20e5a
diff --git a/linux/system/sudo.yml b/linux/system/sudo.yml
index ba499d1..f11accc 100644
--- a/linux/system/sudo.yml
+++ b/linux/system/sudo.yml
@@ -22,6 +22,7 @@
     - /bin/su
     - /usr/sbin/visudo
     - /usr/bin/sudo
+    - /bin/bash
     sudo_coreutils_safe:
     - /usr/bin/less
     - /usr/bin/grep