D22425: personsmodel: Add phoneNumber

[Jonah Brüchert]

jbbgameich added a reviewer: KDE PIM.

REPOSITORY
  R307 KPeople

REVISION DETAIL
  https://phabricator.kde.org/D22425

To: jbbgameich, #plasma:_mobile, #kde_pim
Cc: kde-frameworks-devel, LeGast00n, sbergeron, michaelh, ngraham, bruns