[sosreport] initial profiles support

Add simple profile support. Plugins can define a 'profiles'
attribute that contains a list of profile names that this plugin
belongs to. If a profile is given on the command line only plugins
belonging to that profile will run.

Fixes #247.

Signed-off-by: Bryn M. Reeves <bmr@redhat.com>
[abrt] trigger plugin on more packages

Add the GUI and main abrt packages to the plugin's packages list.

Signed-off-by: Bryn M. Reeves <bmr@redhat.com>