libphonenumber: fix German metadata

Change DE general possibleNumberPattern metadata from {2-15} to {4-14}.

JIRA: CYAN-4258
https://jira.cyanogenmod.org/browse/CYAN-4258
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>

Change-Id: I0c070fe208421941674a6e44b204bdd879527b52