Get rid of the binutils revision... cvs blows

git-svn-id: https://mingw-w64.svn.sourceforge.net/svnroot/mingw-w64@5707 4407c894-4637-0410-b4f5-ada5f102cad1
Set defaults for config_args to be blank, otherwise they will default to the rather useless word None.

git-svn-id: https://mingw-w64.svn.sourceforge.net/svnroot/mingw-w64@5708 4407c894-4637-0410-b4f5-ada5f102cad1
Use the right pathname to the stable branches

git-svn-id: https://mingw-w64.svn.sourceforge.net/svnroot/mingw-w64@5709 4407c894-4637-0410-b4f5-ada5f102cad1
Use 4.6 for 1.x and 4.7 for 2.x

git-svn-id: https://mingw-w64.svn.sourceforge.net/svnroot/mingw-w64@5710 4407c894-4637-0410-b4f5-ada5f102cad1
Prefer hasProp() or just plain getProp() over other way too verbose incantations

git-svn-id: https://mingw-w64.svn.sourceforge.net/svnroot/mingw-w64@5711 4407c894-4637-0410-b4f5-ada5f102cad1
Set the default branches only if the property doesn't exist.  This way, we can see where the source of it comes from.

git-svn-id: https://mingw-w64.svn.sourceforge.net/svnroot/mingw-w64@5712 4407c894-4637-0410-b4f5-ada5f102cad1