german translation of dialer/dialer.properties

see https://l10n.mozilla.org/dashboard/compare?run=361845
german translation of costcontrol.properties

see https://l10n.mozilla.org/dashboard/compare?run=361845
apply latest changes by  Archaeopteryx [:aryx]

see: http://hg.mozilla.org/releases/gaia-l10n/v1_3/de/file/718a23bbff53