devtools: Add xkb version to symbol-check
devtools: Add xkb version to symbol-check

xkb versions symbols (using the prefix `V`), as this library is used by
bitcoin-qt, add it to the valid versions in `symbol-check.py`.

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