build: remove -Wswitch
build: remove -Wswitch

This is enabled by -Wall in GCC and Clang.

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