Rename SPELL_SUMMON_SMALL_MAMMAL and SPELL_SWARM to

SPELL_SUMMON_SMALL_MAMMALS and SPELL_SUMMON_SWARM, respectively, to match their user descriptions.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5188 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on May 22, 2008
4HHCHQD26LSGYC5TSQV25D2KIWLRJDB4BJQHJPSIB3MWNSSE4TGAC
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