* gnu/packages/patches/audacity-build-with-system-portaudio.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/audio.scm (audacity): Update to 2.2.0.
[source]: Add patch to build with system portaudio; add snippet to remove most
bundled libraries.
[inputs]: Replace "gtk+-2" with "gtk+", replace "wxwidgets-gtk2" with
"wxwidgets"; remove "libsbsms"; add "suil" and "portmidi".
[arguments]: Adjust configure flags to avoid using bundled libraries; remove
phase "autoreconf"; add phases "fix-sbsms-check" and "use-upstream-headers".
