[statefs] use statefs rpm macros for provider registration

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
Merge pull request #34 from pgerdt/recalculate-alarm-trigger

[timed] Recalculate alarm timer trigger when time changes
Merge pull request #33 from deztructor/master

[statefs] use statefs rpm macros for provider registration