i found out that this (might) happen if the wrong (developing instead of distrubution) certificate is selected, so i checked it and i REALLY was exporting my ipa with the developer certificate.
so i changed it, and since then i get
=== BUILD NATIVE TARGET PhoneGapTemplate OF PROJECT WITH CONFIGURATION AdHoc ===
Check dependencies
Code Sign error: No unexpired provisioning profiles found that contain any of the keychain's signing certificates
** BUILD FAILED **
The following build commands failed:
Check dependencies
(1 failure)
Build step 'Execute shell' marked build as failure
Archiving artifacts