rebuild configure.exe

95f256d: Remove incorrect check for mingw 64 bit
51f77e9: Fix detection of mingw gcc >=4.6

Change-Id: I8e5a7ac1e8c76f346f58e44cf5b9eb781a1ac4c7
Reviewed-by: Kai Koehne <kai.koehne@digia.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>