Fixed the build by disabling modules not present anymore.

Note: XMMPKit and StepChat are disabled until we got a replacement for the
AddressBook framework. If AddressesKit is checked out using SVN inside
Frameworks, it is possible to build them either with
'make xmppkit=yes stepchat=yes', or by overriding these variables in a
modules.make file at the root of the repository as explained in INSTALL.