FIX: makefile always built with revision, even if no svn detected

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7364 8aca7d54-2c30-db11-9de9-000461428c89
Add parenthesis for big endian number conversion

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7365 8aca7d54-2c30-db11-9de9-000461428c89
Clean up revision using shell string functions

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7366 8aca7d54-2c30-db11-9de9-000461428c89
Further work for a more universal build base

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7367 8aca7d54-2c30-db11-9de9-000461428c89
Further work for a more universal build base

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7368 8aca7d54-2c30-db11-9de9-000461428c89
Further work for a more universal build base

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7369 8aca7d54-2c30-db11-9de9-000461428c89
Compile with configure also on Mingw32

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@7370 8aca7d54-2c30-db11-9de9-000461428c89