Updated MinGW Toolchain

The versions of GCC available for Windows (in MinGW and Cygwin) are updated slowly due to all the testing that needs done for mass consumption. If I can compile the C and C++ compilers in the latest version of GCC, then I assume everything is working. Here are updated versions of GCC and binutils for MinGW with versions of bison and flex for MSys that are needed to complie GCC snapshots.

Note: I no longer use Windows on a regular basis so these packages are updated only when I need them.

MinGW: Build Notes

MSys: Build Notes