Made the version string from autorevision also include base version from wesconfig.h

git-svn-id: http://svn.gna.org/svn/wesnoth/trunk@56534 75b3775d-3801-0410-9e12-e2e43121521d
Added support for autorevision to scons

git-svn-id: http://svn.gna.org/svn/wesnoth/trunk@56535 75b3775d-3801-0410-9e12-e2e43121521d