release/004.060: apt cache dir override

NEWS

+release/004.061 (2016-04-21)
+
+    [os] Add some parameters to the base::os::debian class to make apt use
+    a directory other than /tmp for its cache. This is to get around
+    setting /tmp to noexec. Note that the default is to continue using
+    /tmp as apt's cache directory, so upgrading to this version is
+    safe. (adamhl)
+
 release/004.060 (2016-04-04)
 
     [kerberos] Add the mapping wst-web1-uat.stanford.edu -->