Added functions print_dlua_stack() and print_clua_stack(), which can

be called from the debugger to print the call stacks of the dlua interpreter and the clua interpreter. Code borrowed from ToME 3 (code I originally wrote, so borrowing is definitely okay).

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@7651 c06c8d41-db1a-0410-9941-cceddc491573

Created by  zelgadis  on November 27, 2008
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