[egg] Fix asn.1 parsing into GDate.
[egg] Fix asn.1 parsing into GDate.

 * We used g_date_set_time_val which converted using local time.
 * Changed to set GDate fields independently.

Distrotech/gcr,stefwalter/gcr,Distrotech/gcr,stefwalter/gcr,Distrotech/gcr,stefwalter/gcr,Distrotech/gcr,stefwalter/gcr