When doing "make debug" (which is used by calling makefile "makefile" for both

the "wizard" and "debug" targets) don't re-link the crawl binary if none of the dependencies have changed.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@7883 c06c8d41-db1a-0410-9941-cceddc491573

Created by  zelgadis  on December 20, 2008
MKL266H3SU2ZFMSDTPBYELWHFKA6VH2CRCRP7PIHE5LXOT4N4ROAC
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