Commit [r12447] Maximize Restore History

Move back to parallel builds in general. I now have more experience

with autotools type builds on MSYS/Wine, and they all seem to pop
several error boxes (probably due to some Wine-1.6 issue) typically
during runs of the enormous libtool bash script configured for each
project and typically run (twice!) for each compilation. My
hypothesis now is the parallel builds are putting extreme pressure on
bash running those libtool scripts so the number of error boxes that
are popped for MSYS should be reduced if parallel builds are not
allowed for autotools-configured projects. But I will handle that
with an overall option (see next commit) rather than specifically
turning off parallel builds for each separate autotools project.

airwin 2013-07-31

changed /trunk/cmake/build_projects/wxwidgets/bp.cmake
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