With the current code, packed structs lead to unaligned memory access,
thus causing SIGBUS on ARM.

Let's disable packing on ARM for now. Since it's only used for mixed
32/64bit jackd installations and we're not facing such a scenario on
ARM, there's little use to worry more atm.

A few internal source files were redeclaring types and macros also
declared in the external jack/types.h and jack/systemdeps.h headers.
Since the external header needs them, delete them from the internal
headers.

Thanks to Robin Gareus.
https://github.com/jackaudio/jack2/issues/17

Eventually unused data should not be transmitted. That will require
dynamic package lengths which are not yet supported by netjack2

This changeset is required for proper jackdbus handling of
parameters. jackd handling of parameters is improved by making
driver/internal parameters order on commandline irrelevant. E.g.
"jackd -d alsa -d hw:Intel,0 -P hw:Intel,3" should now give same
result as
"jackd -d alsa -P hw:Intel,3 -d hw:Intel,0".

The code used to create the driver parameter list in
jackctl_parameter_set_value(). Apart from the ordering problem,
the old implementation was not properly handling reset of
driver/internal parameters, because upon reset the parameter was not
removed from the set_parameters list which is supplied to
driver/internal.

This commit shifts driver/internal parameter list composition just
before it is needed. I.e master or slave driver open, switch master,
or internal load. The order of parameters is ensured to be the one
defined by the driver/internal.

AVX requires 32 byte alignment, so let's align the buffers accordingly.

The code used to be in common/JackTools.h until it got moved to
JackTools.cpp in aabbb62282.

However, it is not possible to split a template implementation between
header and source file, so the code in JackTools.cpp was never compiled,
resulting in

Could not open component .so '/tmp/jacktest/lib/jack/jack_net.so':
/tmp/jacktest/lib/jack/jack_net.so: undefined symbol:
_ZN4Jack18JackGnuPlotMonitorIfED1E

See https://github.com/jackaudio/jack2/issues/4 for more.

Note that fill_n in JackTools.h needs additional modifications for
gcc-4.7.

fixes #4

In-server components are called netmanager.so, inprocess.so and so on,
not libnetmanager.so.

The waf syntax for this purpose has been changed between waf-1.5 and
waf-1.6.

PREFIX, LIBDIR and JACK_VERSION are fetched from the environment