To build GDC for Windows 32/64

[Benjamin Thaut]

The last offical binary was posted with this discription:

 > A new binary has been posted.  This contains GDC master up to Nov. 28th.
 >
 > There's one annoyingly significant bug that I am aware of regarding 
exceptions.
 >
 > Any uncaught exceptions will result in an infinite loop eventually 
dieing due to stack overflow.  However, this is only a minor annoyance > 
and something to keep in mind when using GDB.
 >
 > Installation instructions:
 >
 > 1. Download and install TDM 4.6.1 MinGW64( To a dedicated directory 
for GDC )
 > 2. Extract the downloaded archive into the base of the newly 
installed TDM install.
 >
 > If you've done this before, you can just do step 2.
 >
 > MinGW64 installer
 > http://tdm-gcc.tdragon.net/
 >
 > You'll need to pull it from the archives. 
http://sourceforge.net/projects/tdm-gcc/files/TDM-GCC%20Installer/Previous/1.1006.0/
 >
 > GDC binary
 > 
https://bitbucket.org/goshawk/gdc/downloads/gcc-4.6.1-tdm64-1-gdc-20130108-D2.060.7z
 >
 > Please post all issues in D.gnu or on GDC's bugzilla at 
http://gdcproject.org/bugzilla/