Differentiate between god gift monsters and non-gift monsters with a god via

MF_GOD_GIFT. When a non-god gift priestly monster is first created it will be given a god: orcs Beogh, mummies Kikubaaqudgha or Yredelemnul, and deep elves Kikubaaqudgha, Yredelemnul or Makhleb.

Monster spell announcments/messages for priestly monsters now uses the name of their god.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8008 c06c8d41-db1a-0410-9941-cceddc491573

Created by  zelgadis  on December 28, 2008
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