linux submodule update:  release 9 to fix RTAI goof

Deleted RTAI kernel .config rather than removing a few lines....
WIP:  Redo dependency rules

Turns out the old rules are too hard to maintain, and it's easier to
code and undersand generated rules that directly translate from
e.g. arch-dependent to -independent.

This is a WIP and needs to be continued for '-clean' and other
targets, and the old cruft cleaned up.
zeromq4 4.0.4-2 updates:  symbol version fixes

Changelog:
    v. 4.0.4-2:  Fix confusing symbol versions

    Because the package name changed from libzmq3 to libzmq4, preserving
    older symbol names is unnecessary and confusing:

        $ apt-cache show machinekit | grep ^Depends
        Depends: [...] libzmq4 (>= 3.2.3+dfsg)
czmq 2.2.0-0.2 package updates:  symbols file

- Remove pkg release to ensure '~' components don't get in the way
- Remove 1.2.0 symbol versions, irrelevant after package rename
Makefile:  Add EXTRA_PBUILD_ARGS param

Useful for setting proxy server, at least
Add python-pyftpdlib package
pbuilderrc:  bind-mount /run/shm (for /dev/shm)

The python-pyftpdlib package unit tests rely on /dev/shm.