vala: Ensure all .vapi files contain GIR namespace CCode attributes

Ensure all .vapi files exported by Tracker contain gir_namespace and
gir_version CCode attributes, otherwise Vala code compiled against them
will hit this warning:

tracker-sparql-1.0.vapi:4.2-4.17: warning: Namespace Sparql does not
have a GIR namespace and version annotation
	namespace Sparql {

https://bugzilla.gnome.org/show_bug.cgi?id=751051