This patch significantly speeds up make process (mostly noticeable on MinGW+MSYS) canceling implicit rules for dependencies and Makefile.in that caused lot of unnecessary file checks (in case of Windoze those are pretty slow). See "make -d" before and after applying this patch.

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extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%404140