Add M_SPEAKS to gnolls. It was added in r10033 to 0.5, no mention in the log message but I think it makes sense.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@10526 c06c8d41-db1a-0410-9941-cceddc491573

Created by  evktalo  on August 12, 2009
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