Add MS_WIN64 macro when built on amd64 + mingw.
Add MS_WIN64 macro when built on amd64 + mingw.

rmcgibbo/numpy,ChristopherHogan/numpy,felipebetancur/numpy,madphysicist/numpy,pdebuyl/numpy,hainm/numpy,cjermain/numpy,musically-ut/numpy,trankmichael/numpy,yiakwy/numpy,Yusa95/numpy,kiwifb/numpy,ogrisel/numpy,drasmuss/numpy,sonnyhu/numpy,dwf/numpy,githubmlai/numpy,jakirkham/numpy,b-carter/numpy,ESSS/numpy,mwiebe/numpy,ajdawson/numpy,KaelChen/numpy,jakirkham/numpy,bertrand-l/numpy,charris/numpy,moreati/numpy,has2k1/numpy,naritta/numpy,nbeaver/numpy,rudimeier/numpy,tynn/numpy,githubmlai/numpy,embray/numpy,rmcgibbo/numpy,gfyoung/numpy,kirillzhuravlev/numpy,BabeNovelty/numpy,ssanderson/numpy,stefanv/numpy,dwillmer/numpy,nguyentu1602/numpy,chatcannon/numpy,dch312/numpy,astrofrog/numpy,solarjoe/numpy,kiwifb/numpy,skymanaditya1/numpy,KaelChen/numpy,madphysicist/numpy,BabeNovelty/numpy,behzadnouri/numpy,anntzer/numpy,ahaldane/numpy,WillieMaddox/numpy,jakirkham/numpy,mhvk/numpy,madphysicist/numpy,dimasad/numpy,ChanderG/numpy,cowlicks/numpy,rgommers/numpy,MaPePeR/numpy,charris/numpy,Yusa95/numpy,sonnyhu/numpy,dwf/numpy,ESSS/numpy,Anwesh43/numpy,bmorris3/numpy,embray/numpy,pyparallel/numpy,ajdawson/numpy,sinhrks/numpy,CMartelLML/numpy,leifdenby/numpy,pbrod/numpy,trankmichael/numpy,charris/numpy,CMartelLML/numpy,dwillmer/numpy,BabeNovelty/numpy,BMJHayward/numpy,empeeu/numpy,astrofrog/numpy,mortada/numpy,andsor/numpy,skymanaditya1/numpy,maniteja123/numpy,grlee77/numpy,WarrenWeckesser/numpy,grlee77/numpy,pelson/numpy,pdebuyl/numpy,KaelChen/numpy,mwiebe/numpy,ahaldane/numpy,utke1/numpy,mindw/numpy,ChanderG/numpy,ContinuumIO/numpy,anntzer/numpy,ddasilva/numpy,has2k1/numpy,utke1/numpy,pelson/numpy,Linkid/numpy,MSeifert04/numpy,pbrod/numpy,rajathkumarmp/numpy,tdsmith/numpy,ViralLeadership/numpy,andsor/numpy,AustereCuriosity/numpy,WarrenWeckesser/numpy,ContinuumIO/numpy,grlee77/numpy,numpy/numpy,cjermain/numpy,tdsmith/numpy,numpy/numpy-refactor,shoyer/numpy,andsor/numpy,Linkid/numpy,GaZ3ll3/numpy,pizzathief/numpy,pdebuyl/numpy,astrofrog/numpy,musically-ut/numpy,brandon-rhodes/numpy,seberg/numpy,jonathanunderwood/numpy,ajdawson/numpy,madphysicist/numpy,embray/numpy,cjermain/numpy,immerrr/numpy,mattip/numpy,mattip/numpy,ddasilva/numpy,nguyentu1602/numpy,pbrod/numpy,BMJHayward/numpy,GaZ3ll3/numpy,ewmoore/numpy,jorisvandenbossche/numpy,dimasad/numpy,ssanderson/numpy,jschueller/numpy,chiffa/numpy,abalkin/numpy,bringingheavendown/numpy,GrimDerp/numpy,mhvk/numpy,mathdd/numpy,dato-code/numpy,mindw/numpy,stuarteberg/numpy,skwbc/numpy,Srisai85/numpy,gfyoung/numpy,joferkington/numpy,githubmlai/numpy,grlee77/numpy,NextThought/pypy-numpy,pbrod/numpy,felipebetancur/numpy,WarrenWeckesser/numpy,ewmoore/numpy,MaPePeR/numpy,MSeifert04/numpy,dimasad/numpy,simongibbons/numpy,immerrr/numpy,hainm/numpy,mingwpy/numpy,Dapid/numpy,numpy/numpy-refactor,mattip/numpy,Anwesh43/numpy,ewmoore/numpy,leifdenby/numpy,Dapid/numpy,skwbc/numpy,GrimDerp/numpy,yiakwy/numpy,GrimDerp/numpy,tacaswell/numpy,hainm/numpy,MSeifert04/numpy,MichaelAquilina/numpy,NextThought/pypy-numpy,sigma-random/numpy,pelson/numpy,shoyer/numpy,SunghanKim/numpy,ddasilva/numpy,mingwpy/numpy,empeeu/numpy,Srisai85/numpy,stuarteberg/numpy,nbeaver/numpy,BabeNovelty/numpy,tdsmith/numpy,mhvk/numpy,dwf/numpy,simongibbons/numpy,musically-ut/numpy,endolith/numpy,rherault-insa/numpy,pdebuyl/numpy,simongibbons/numpy,Linkid/numpy,kirillzhuravlev/numpy,MaPePeR/numpy,grlee77/numpy,bertrand-l/numpy,Eric89GXL/numpy,astrofrog/numpy,jonathanunderwood/numpy,njase/numpy,abalkin/numpy,shoyer/numpy,ChristopherHogan/numpy,chatcannon/numpy,mingwpy/numpy,ChristopherHogan/numpy,pelson/numpy,tacaswell/numpy,pizzathief/numpy,jschueller/numpy,kiwifb/numpy,Anwesh43/numpy,GaZ3ll3/numpy,jorisvandenbossche/numpy,jorisvandenbossche/numpy,ewmoore/numpy,simongibbons/numpy,tynn/numpy,maniteja123/numpy,Linkid/numpy,cjermain/numpy,trankmichael/numpy,dato-code/numpy,gmcastil/numpy,tynn/numpy,rherault-insa/numpy,immerrr/numpy,ekalosak/numpy,immerrr/numpy,ogrisel/numpy,SunghanKim/numpy,Eric89GXL/numpy,SiccarPoint/numpy,mortada/numpy,Eric89GXL/numpy,njase/numpy,GrimDerp/numpy,abalkin/numpy,bmorris3/numpy,mortada/numpy,argriffing/numpy,mathdd/numpy,Yusa95/numpy,jschueller/numpy,ahaldane/numpy,rhythmsosad/numpy,kirillzhuravlev/numpy,numpy/numpy,chiffa/numpy,pizzathief/numpy,MichaelAquilina/numpy,ewmoore/numpy,numpy/numpy-refactor,jakirkham/numpy,ESSS/numpy,brandon-rhodes/numpy,stefanv/numpy,bringingheavendown/numpy,cowlicks/numpy,pyparallel/numpy,gmcastil/numpy,SiccarPoint/numpy,b-carter/numpy,joferkington/numpy,chatcannon/numpy,ekalosak/numpy,dwf/numpy,matthew-brett/numpy,rgommers/numpy,skwbc/numpy,solarjoe/numpy,nguyentu1602/numpy,numpy/numpy-refactor,pizzathief/numpy,groutr/numpy,astrofrog/numpy,pbrod/numpy,rudimeier/numpy,tacaswell/numpy,dimasad/numpy,larsmans/numpy,sonnyhu/numpy,dch312/numpy,hainm/numpy,rgommers/numpy,rudimeier/numpy,b-carter/numpy,ekalosak/numpy,jschueller/numpy,skymanaditya1/numpy,ogrisel/numpy,MSeifert04/numpy,behzadnouri/numpy,WillieMaddox/numpy,seberg/numpy,larsmans/numpy,bringingheavendown/numpy,WarrenWeckesser/numpy,brandon-rhodes/numpy,NextThought/pypy-numpy,gfyoung/numpy,utke1/numpy,moreati/numpy,solarjoe/numpy,rhythmsosad/numpy,dch312/numpy,mindw/numpy,SiccarPoint/numpy,mhvk/numpy,numpy/numpy,ahaldane/numpy,Anwesh43/numpy,CMartelLML/numpy,Srisai85/numpy,ViralLeadership/numpy,cowlicks/numpy,BMJHayward/numpy,MichaelAquilina/numpy,sigma-random/numpy,mathdd/numpy,SiccarPoint/numpy,mortada/numpy,CMartelLML/numpy,moreati/numpy,rherault-insa/numpy,jorisvandenbossche/numpy,gmcastil/numpy,stefanv/numpy,naritta/numpy,groutr/numpy,empeeu/numpy,jankoslavic/numpy,maniteja123/numpy,sinhrks/numpy,matthew-brett/numpy,drasmuss/numpy,matthew-brett/numpy,naritta/numpy,skymanaditya1/numpy,felipebetancur/numpy,ViralLeadership/numpy,jankoslavic/numpy,mwiebe/numpy,shoyer/numpy,argriffing/numpy,numpy/numpy,simongibbons/numpy,brandon-rhodes/numpy,jonathanunderwood/numpy,jankoslavic/numpy,ChristopherHogan/numpy,matthew-brett/numpy,endolith/numpy,seberg/numpy,ogrisel/numpy,ekalosak/numpy,rudimeier/numpy,MSeifert04/numpy,rhythmsosad/numpy,empeeu/numpy,leifdenby/numpy,chiffa/numpy,nguyentu1602/numpy,kirillzhuravlev/numpy,madphysicist/numpy,nbeaver/numpy,behzadnouri/numpy,sonnyhu/numpy,dato-code/numpy,dwillmer/numpy,mindw/numpy,joferkington/numpy,rajathkumarmp/numpy,larsmans/numpy,Srisai85/numpy,sigma-random/numpy,tdsmith/numpy,KaelChen/numpy,felipebetancur/numpy,naritta/numpy,ChanderG/numpy,embray/numpy,mathdd/numpy,MaPePeR/numpy,pyparallel/numpy,Dapid/numpy,mhvk/numpy,GaZ3ll3/numpy,dch312/numpy,SunghanKim/numpy,jakirkham/numpy,has2k1/numpy,endolith/numpy,stuarteberg/numpy,sinhrks/numpy,pizzathief/numpy,shoyer/numpy,trankmichael/numpy,anntzer/numpy,drasmuss/numpy,dato-code/numpy,seberg/numpy,pelson/numpy,stefanv/numpy,dwf/numpy,stuarteberg/numpy,larsmans/numpy,numpy/numpy-refactor,jorisvandenbossche/numpy,Yusa95/numpy,ajdawson/numpy,matthew-brett/numpy,githubmlai/numpy,ahaldane/numpy,joferkington/numpy,AustereCuriosity/numpy,cowlicks/numpy,WarrenWeckesser/numpy,bmorris3/numpy,anntzer/numpy,ogrisel/numpy,yiakwy/numpy,musically-ut/numpy,njase/numpy,embray/numpy,charris/numpy,has2k1/numpy,SunghanKim/numpy,yiakwy/numpy,ChanderG/numpy,mattip/numpy,bertrand-l/numpy,endolith/numpy,AustereCuriosity/numpy,andsor/numpy,BMJHayward/numpy,jankoslavic/numpy,rmcgibbo/numpy,rajathkumarmp/numpy,bmorris3/numpy,stefanv/numpy,argriffing/numpy,WillieMaddox/numpy,ssanderson/numpy,sigma-random/numpy,groutr/numpy,NextThought/pypy-numpy,dwillmer/numpy,sinhrks/numpy,rajathkumarmp/numpy,Eric89GXL/numpy,rhythmsosad/numpy,rmcgibbo/numpy,ContinuumIO/numpy,rgommers/numpy,MichaelAquilina/numpy,mingwpy/numpy