pidgin/pidgin

Use the G_DECLARE_*_TYPE macros for JabberProtocol and XMPPProtocol

Testing Done:
Connected an XMPP account.

Reviewed at https://reviews.imfreedom.org/r/618/
nullclient = executable('nullclient', 'nullclient.c', 'defines.h',
c_args : ['-DSTANDALONE'],
dependencies : [libpurple_dep, glib])