vala: More vala fixes

vala: More vala fixes

1. Remove the "has_destroy_function=false" attribute. It was only
necessary because of a bug in vala which is fixed in 0.12. [1]

2. Add sizes to all fixed-size arrays to make vala recognize them as
such. Using symbolic constants for this is not yet supported. [2]

3. CardInfo struct: Move the brackets in the list of available profiles
to the type to make it clear that this is a dynamically-sized array. [3]

[1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=622773
[2] https://bugzilla.gnome.org/show_bug.cgi?id=647788
[3] http://0pointer.de/lennart/projects/pulseaudio/doxygen/structpa__card__info.html