build: Try posix-specific CXX first for mingw32 host
build: Try posix-specific CXX first for mingw32 host

fujicoin/fujicoin,sstone/bitcoin,ajtowns/bitcoin,pataquets/namecoin-core,bitcoinknots/bitcoin,kallewoof/bitcoin,sstone/bitcoin,jlopp/statoshi,pataquets/namecoin-core,lateminer/bitcoin,sstone/bitcoin,anditto/bitcoin,domob1812/bitcoin,dscotese/bitcoin,domob1812/bitcoin,particl/particl-core,kallewoof/bitcoin,domob1812/bitcoin,achow101/bitcoin,jambolo/bitcoin,instagibbs/bitcoin,domob1812/namecore,lateminer/bitcoin,ajtowns/bitcoin,AkioNak/bitcoin,andreaskern/bitcoin,tecnovert/particl-core,jamesob/bitcoin,fanquake/bitcoin,jlopp/statoshi,domob1812/namecore,anditto/bitcoin,andreaskern/bitcoin,tecnovert/particl-core,particl/particl-core,namecoin/namecoin-core,tecnovert/particl-core,dscotese/bitcoin,GroestlCoin/bitcoin,lateminer/bitcoin,fanquake/bitcoin,AkioNak/bitcoin,kallewoof/bitcoin,jambolo/bitcoin,achow101/bitcoin,mruddy/bitcoin,jamesob/bitcoin,bitcoinsSG/bitcoin,lateminer/bitcoin,pataquets/namecoin-core,dscotese/bitcoin,sstone/bitcoin,fujicoin/fujicoin,kallewoof/bitcoin,domob1812/namecore,domob1812/namecore,ajtowns/bitcoin,anditto/bitcoin,GroestlCoin/bitcoin,Xekyo/bitcoin,andreaskern/bitcoin,GroestlCoin/GroestlCoin,jlopp/statoshi,fanquake/bitcoin,mruddy/bitcoin,domob1812/bitcoin,bitcoin/bitcoin,sipsorcery/bitcoin,bitcoin/bitcoin,GroestlCoin/bitcoin,bitcoin/bitcoin,namecoin/namecore,jamesob/bitcoin,AkioNak/bitcoin,Xekyo/bitcoin,namecoin/namecoin-core,namecoin/namecore,anditto/bitcoin,bitcoinknots/bitcoin,namecoin/namecore,bitcoin/bitcoin,Xekyo/bitcoin,instagibbs/bitcoin,bitcoin/bitcoin,bitcoinknots/bitcoin,lateminer/bitcoin,Xekyo/bitcoin,andreaskern/bitcoin,pataquets/namecoin-core,instagibbs/bitcoin,domob1812/namecore,dscotese/bitcoin,sipsorcery/bitcoin,sipsorcery/bitcoin,jamesob/bitcoin,mruddy/bitcoin,mruddy/bitcoin,tecnovert/particl-core,jamesob/bitcoin,anditto/bitcoin,jamesob/bitcoin,GroestlCoin/GroestlCoin,bitcoinsSG/bitcoin,fanquake/bitcoin,dscotese/bitcoin,AkioNak/bitcoin,namecoin/namecoin-core,kallewoof/bitcoin,domob1812/bitcoin,namecoin/namecoin-core,Xekyo/bitcoin,instagibbs/bitcoin,ajtowns/bitcoin,namecoin/namecoin-core,fujicoin/fujicoin,pataquets/namecoin-core,GroestlCoin/bitcoin,bitcoinknots/bitcoin,jlopp/statoshi,jambolo/bitcoin,bitcoinsSG/bitcoin,bitcoinsSG/bitcoin,fujicoin/fujicoin,domob1812/namecore,namecoin/namecore,achow101/bitcoin,bitcoinsSG/bitcoin,particl/particl-core,tecnovert/particl-core,lateminer/bitcoin,andreaskern/bitcoin,AkioNak/bitcoin,fanquake/bitcoin,instagibbs/bitcoin,namecoin/namecore,sipsorcery/bitcoin,GroestlCoin/bitcoin,GroestlCoin/GroestlCoin,sstone/bitcoin,jambolo/bitcoin,jlopp/statoshi,fujicoin/fujicoin,anditto/bitcoin,sipsorcery/bitcoin,fujicoin/fujicoin,namecoin/namecore,instagibbs/bitcoin,jambolo/bitcoin,jambolo/bitcoin,achow101/bitcoin,sstone/bitcoin,GroestlCoin/GroestlCoin,andreaskern/bitcoin,domob1812/bitcoin,particl/particl-core,particl/particl-core,ajtowns/bitcoin,bitcoinknots/bitcoin,sipsorcery/bitcoin,namecoin/namecoin-core,fanquake/bitcoin,AkioNak/bitcoin,GroestlCoin/GroestlCoin,GroestlCoin/GroestlCoin,achow101/bitcoin,mruddy/bitcoin,kallewoof/bitcoin,mruddy/bitcoin,tecnovert/particl-core,Xekyo/bitcoin,pataquets/namecoin-core,bitcoin/bitcoin,GroestlCoin/bitcoin,particl/particl-core,bitcoinsSG/bitcoin,ajtowns/bitcoin,achow101/bitcoin,dscotese/bitcoin,jlopp/statoshi