test: Add missing signal.h header
test: Add missing signal.h header

util_tests.cpp needs to include the signal.h header on FreeBSD.

Reported by denis2342 on IRC.

vmp32k/litecoin,jnewbery/bitcoin,myriadcoin/myriadcoin,jlopp/statoshi,JeremyRubin/bitcoin,pstratem/bitcoin,TheBlueMatt/bitcoin,FeatherCoin/Feathercoin,thrasher-/litecoin,litecoin-project/litecoin,JeremyRubin/bitcoin,prusnak/bitcoin,n1bor/bitcoin,anditto/bitcoin,tecnovert/particl-core,tecnovert/particl-core,alecalve/bitcoin,vertcoin/vertcoin,prusnak/bitcoin,ahmedbodi/vertcoin,namecoin/namecore,ElementsProject/elements,Christewart/bitcoin,alecalve/bitcoin,bespike/litecoin,EthanHeilman/bitcoin,h4x3rotab/BTCGPU,GroestlCoin/bitcoin,afk11/bitcoin,domob1812/huntercore,bitcoinsSG/bitcoin,r8921039/bitcoin,droark/bitcoin,sebrandon1/bitcoin,kallewoof/bitcoin,jambolo/bitcoin,EthanHeilman/bitcoin,mm-s/bitcoin,GroestlCoin/GroestlCoin,pstratem/bitcoin,kallewoof/bitcoin,domob1812/namecore,fujicoin/fujicoin,GlobalBoost/GlobalBoost,jlopp/statoshi,Bushstar/UFO-Project,instagibbs/bitcoin,bitcoinknots/bitcoin,namecoin/namecoin-core,rnicoll/dogecoin,andreaskern/bitcoin,jnewbery/bitcoin,lbryio/lbrycrd,myriadteam/myriadcoin,rnicoll/dogecoin,domob1812/namecore,ajtowns/bitcoin,n1bor/bitcoin,digibyte/digibyte,sipsorcery/bitcoin,tjps/bitcoin,rnicoll/bitcoin,qtumproject/qtum,apoelstra/bitcoin,MarcoFalke/bitcoin,randy-waterhouse/bitcoin,mitchellcash/bitcoin,jonasschnelli/bitcoin,Kogser/bitcoin,Christewart/bitcoin,nikkitan/bitcoin,dscotese/bitcoin,instagibbs/bitcoin,Flowdalic/bitcoin,dscotese/bitcoin,sstone/bitcoin,pataquets/namecoin-core,CryptArc/bitcoin,jtimon/bitcoin,donaloconnor/bitcoin,OmniLayer/omnicore,digibyte/digibyte,litecoin-project/litecoin,thrasher-/litecoin,mruddy/bitcoin,anditto/bitcoin,h4x3rotab/BTCGPU,yenliangl/bitcoin,globaltoken/globaltoken,ElementsProject/elements,RHavar/bitcoin,joshrabinowitz/bitcoin,jambolo/bitcoin,gjhiggins/vcoincore,MarcoFalke/bitcoin,domob1812/bitcoin,lbryio/lbrycrd,lbryio/lbrycrd,kazcw/bitcoin,jnewbery/bitcoin,domob1812/namecore,bitcoin/bitcoin,andreaskern/bitcoin,pataquets/namecoin-core,paveljanik/bitcoin,r8921039/bitcoin,qtumproject/qtum,prusnak/bitcoin,gjhiggins/vcoincore,wellenreiter01/Feathercoin,afk11/bitcoin,Flowdalic/bitcoin,tjps/bitcoin,jtimon/bitcoin,bitcoin/bitcoin,cdecker/bitcoin,lateminer/bitcoin,thrasher-/litecoin,sebrandon1/bitcoin,mruddy/bitcoin,ahmedbodi/vertcoin,Kogser/bitcoin,alecalve/bitcoin,practicalswift/bitcoin,Sjors/bitcoin,practicalswift/bitcoin,prusnak/bitcoin,practicalswift/bitcoin,bitcoinsSG/bitcoin,randy-waterhouse/bitcoin,mitchellcash/bitcoin,particl/particl-core,Bushstar/UFO-Project,vmp32k/litecoin,Kogser/bitcoin,nikkitan/bitcoin,myriadcoin/myriadcoin,rnicoll/bitcoin,Xekyo/bitcoin,midnightmagic/bitcoin,Sjors/bitcoin,practicalswift/bitcoin,gjhiggins/vcoincore,vertcoin/vertcoin,bitcoin/bitcoin,peercoin/peercoin,GroestlCoin/bitcoin,GroestlCoin/GroestlCoin,bespike/litecoin,sebrandon1/bitcoin,ericshawlinux/bitcoin,afk11/bitcoin,peercoin/peercoin,TheBlueMatt/bitcoin,JeremyRubin/bitcoin,droark/bitcoin,droark/bitcoin,lateminer/bitcoin,Flowdalic/bitcoin,droark/bitcoin,domob1812/huntercore,pataquets/namecoin-core,andreaskern/bitcoin,kazcw/bitcoin,MarcoFalke/bitcoin,MeshCollider/bitcoin,jmcorgan/bitcoin,wellenreiter01/Feathercoin,paveljanik/bitcoin,Flowdalic/bitcoin,Bushstar/UFO-Project,Kogser/bitcoin,fanquake/bitcoin,h4x3rotab/BTCGPU,FeatherCoin/Feathercoin,MarcoFalke/bitcoin,r8921039/bitcoin,myriadcoin/myriadcoin,alecalve/bitcoin,rnicoll/bitcoin,mm-s/bitcoin,BTCGPU/BTCGPU,ElementsProject/elements,vmp32k/litecoin,stamhe/bitcoin,namecoin/namecoin-core,mitchellcash/bitcoin,tjps/bitcoin,fanquake/bitcoin,rawodb/bitcoin,bespike/litecoin,DigitalPandacoin/pandacoin,kazcw/bitcoin,mitchellcash/bitcoin,achow101/bitcoin,ericshawlinux/bitcoin,vertcoin/vertcoin,jmcorgan/bitcoin,peercoin/peercoin,Christewart/bitcoin,bitcoinsSG/bitcoin,Kogser/bitcoin,droark/bitcoin,afk11/bitcoin,nikkitan/bitcoin,FeatherCoin/Feathercoin,Bushstar/UFO-Project,qtumproject/qtum,CryptArc/bitcoin,bitcoinsSG/bitcoin,namecoin/namecore,AkioNak/bitcoin,afk11/bitcoin,n1bor/bitcoin,ElementsProject/elements,jtimon/bitcoin,GroestlCoin/bitcoin,donaloconnor/bitcoin,Kogser/bitcoin,cdecker/bitcoin,rnicoll/dogecoin,peercoin/peercoin,mruddy/bitcoin,lateminer/bitcoin,cdecker/bitcoin,midnightmagic/bitcoin,RHavar/bitcoin,Kogser/bitcoin,GlobalBoost/GlobalBoost,n1bor/bitcoin,lateminer/bitcoin,OmniLayer/omnicore,FeatherCoin/Feathercoin,tjps/bitcoin,ElementsProject/elements,bespike/litecoin,mruddy/bitcoin,lateminer/bitcoin,Xekyo/bitcoin,pataquets/namecoin-core,TheBlueMatt/bitcoin,bespike/litecoin,dscotese/bitcoin,bitcoinknots/bitcoin,guncoin/guncoin,domob1812/namecore,jamesob/bitcoin,MeshCollider/bitcoin,rnicoll/bitcoin,BTCGPU/BTCGPU,monacoinproject/monacoin,tjps/bitcoin,Xekyo/bitcoin,nikkitan/bitcoin,TheBlueMatt/bitcoin,fujicoin/fujicoin,bitcoinknots/bitcoin,Xekyo/bitcoin,gjhiggins/vcoincore,domob1812/bitcoin,r8921039/bitcoin,jamesob/bitcoin,MarcoFalke/bitcoin,kallewoof/bitcoin,stamhe/bitcoin,bitcoin/bitcoin,joshrabinowitz/bitcoin,myriadcoin/myriadcoin,rnicoll/dogecoin,jmcorgan/bitcoin,sstone/bitcoin,tjps/bitcoin,alecalve/bitcoin,apoelstra/bitcoin,digibyte/digibyte,myriadteam/myriadcoin,sipsorcery/bitcoin,pataquets/namecoin-core,randy-waterhouse/bitcoin,ElementsProject/elements,CryptArc/bitcoin,donaloconnor/bitcoin,FeatherCoin/Feathercoin,ajtowns/bitcoin,domob1812/huntercore,jonasschnelli/bitcoin,namecoin/namecoin-core,cdecker/bitcoin,jtimon/bitcoin,myriadteam/myriadcoin,guncoin/guncoin,namecoin/namecore,pstratem/bitcoin,sipsorcery/bitcoin,lbryio/lbrycrd,particl/particl-core,pataquets/namecoin-core,domob1812/bitcoin,TheBlueMatt/bitcoin,monacoinproject/monacoin,rawodb/bitcoin,GroestlCoin/GroestlCoin,midnightmagic/bitcoin,lateminer/bitcoin,jtimon/bitcoin,paveljanik/bitcoin,digibyte/digibyte,ahmedbodi/vertcoin,FeatherCoin/Feathercoin,bitcoinknots/bitcoin,BTCGPU/BTCGPU,rnicoll/dogecoin,qtumproject/qtum,donaloconnor/bitcoin,monacoinproject/monacoin,donaloconnor/bitcoin,sstone/bitcoin,jmcorgan/bitcoin,nikkitan/bitcoin,domob1812/bitcoin,myriadcoin/myriadcoin,jlopp/statoshi,JeremyRubin/bitcoin,untrustbank/litecoin,domob1812/bitcoin,jnewbery/bitcoin,cdecker/bitcoin,JeremyRubin/bitcoin,mm-s/bitcoin,digibyte/digibyte,myriadteam/myriadcoin,RHavar/bitcoin,qtumproject/qtum,achow101/bitcoin,bitcoinsSG/bitcoin,monacoinproject/monacoin,tecnovert/particl-core,jlopp/statoshi,stamhe/bitcoin,DigitalPandacoin/pandacoin,jamesob/bitcoin,paveljanik/bitcoin,stamhe/bitcoin,lbryio/lbrycrd,globaltoken/globaltoken,sipsorcery/bitcoin,particl/particl-core,fanquake/bitcoin,domob1812/bitcoin,anditto/bitcoin,domob1812/huntercore,Bushstar/UFO-Project,jnewbery/bitcoin,AkioNak/bitcoin,afk11/bitcoin,cdecker/bitcoin,kazcw/bitcoin,guncoin/guncoin,DigitalPandacoin/pandacoin,alecalve/bitcoin,randy-waterhouse/bitcoin,jambolo/bitcoin,r8921039/bitcoin,GroestlCoin/GroestlCoin,litecoin-project/litecoin,stamhe/bitcoin,andreaskern/bitcoin,sebrandon1/bitcoin,ajtowns/bitcoin,EthanHeilman/bitcoin,joshrabinowitz/bitcoin,rnicoll/bitcoin,domob1812/namecore,namecoin/namecoin-core,ericshawlinux/bitcoin,jonasschnelli/bitcoin,kallewoof/bitcoin,jlopp/statoshi,lbryio/lbrycrd,sstone/bitcoin,donaloconnor/bitcoin,domob1812/huntercore,guncoin/guncoin,kallewoof/bitcoin,particl/particl-core,wellenreiter01/Feathercoin,pstratem/bitcoin,fanquake/bitcoin,yenliangl/bitcoin,apoelstra/bitcoin,AkioNak/bitcoin,apoelstra/bitcoin,rawodb/bitcoin,n1bor/bitcoin,monacoinproject/monacoin,jonasschnelli/bitcoin,DigitalPandacoin/pandacoin,yenliangl/bitcoin,pstratem/bitcoin,untrustbank/litecoin,litecoin-project/litecoin,fanquake/bitcoin,MarcoFalke/bitcoin,ajtowns/bitcoin,prusnak/bitcoin,ahmedbodi/vertcoin,sipsorcery/bitcoin,domob1812/namecore,ericshawlinux/bitcoin,Christewart/bitcoin,AkioNak/bitcoin,EthanHeilman/bitcoin,qtumproject/qtum,sstone/bitcoin,h4x3rotab/BTCGPU,OmniLayer/omnicore,andreaskern/bitcoin,practicalswift/bitcoin,bitcoin/bitcoin,AkioNak/bitcoin,achow101/bitcoin,untrustbank/litecoin,thrasher-/litecoin,myriadcoin/myriadcoin,MeshCollider/bitcoin,ajtowns/bitcoin,BTCGPU/BTCGPU,mm-s/bitcoin,Christewart/bitcoin,sebrandon1/bitcoin,yenliangl/bitcoin,Kogser/bitcoin,yenliangl/bitcoin,mm-s/bitcoin,OmniLayer/omnicore,jamesob/bitcoin,Sjors/bitcoin,mm-s/bitcoin,Xekyo/bitcoin,paveljanik/bitcoin,litecoin-project/litecoin,AkioNak/bitcoin,GlobalBoost/GlobalBoost,TheBlueMatt/bitcoin,namecoin/namecore,litecoin-project/litecoin,instagibbs/bitcoin,mruddy/bitcoin,r8921039/bitcoin,jtimon/bitcoin,yenliangl/bitcoin,midnightmagic/bitcoin,mitchellcash/bitcoin,OmniLayer/omnicore,bespike/litecoin,bitcoinknots/bitcoin,Christewart/bitcoin,fujicoin/fujicoin,droark/bitcoin,tecnovert/particl-core,rawodb/bitcoin,midnightmagic/bitcoin,ericshawlinux/bitcoin,myriadteam/myriadcoin,kazcw/bitcoin,CryptArc/bitcoin,GroestlCoin/GroestlCoin,GroestlCoin/GroestlCoin,jmcorgan/bitcoin,dscotese/bitcoin,jambolo/bitcoin,guncoin/guncoin,wellenreiter01/Feathercoin,andreaskern/bitcoin,bitcoinsSG/bitcoin,joshrabinowitz/bitcoin,anditto/bitcoin,sipsorcery/bitcoin,particl/particl-core,Bushstar/UFO-Project,RHavar/bitcoin,rawodb/bitcoin,thrasher-/litecoin,stamhe/bitcoin,Sjors/bitcoin,Flowdalic/bitcoin,bitcoin/bitcoin,rawodb/bitcoin,rnicoll/bitcoin,vertcoin/vertcoin,BTCGPU/BTCGPU,tecnovert/particl-core,GroestlCoin/bitcoin,jambolo/bitcoin,globaltoken/globaltoken,mruddy/bitcoin,anditto/bitcoin,GlobalBoost/GlobalBoost,apoelstra/bitcoin,globaltoken/globaltoken,kallewoof/bitcoin,Xekyo/bitcoin,vmp32k/litecoin,JeremyRubin/bitcoin,EthanHeilman/bitcoin,h4x3rotab/BTCGPU,GlobalBoost/GlobalBoost,ahmedbodi/vertcoin,instagibbs/bitcoin,Kogser/bitcoin,lbryio/lbrycrd,GlobalBoost/GlobalBoost,tecnovert/particl-core,nikkitan/bitcoin,joshrabinowitz/bitcoin,instagibbs/bitcoin,namecoin/namecore,achow101/bitcoin,jonasschnelli/bitcoin,ericshawlinux/bitcoin,vmp32k/litecoin,Kogser/bitcoin,Kogser/bitcoin,namecoin/namecoin-core,anditto/bitcoin,Kogser/bitcoin,GroestlCoin/bitcoin,untrustbank/litecoin,MeshCollider/bitcoin,ahmedbodi/vertcoin,apoelstra/bitcoin,kazcw/bitcoin,ajtowns/bitcoin,CryptArc/bitcoin,prusnak/bitcoin,globaltoken/globaltoken,sstone/bitcoin,guncoin/guncoin,thrasher-/litecoin,dscotese/bitcoin,GroestlCoin/bitcoin,dscotese/bitcoin,wellenreiter01/Feathercoin,peercoin/peercoin,DigitalPandacoin/pandacoin,pstratem/bitcoin,EthanHeilman/bitcoin,mitchellcash/bitcoin,CryptArc/bitcoin,h4x3rotab/BTCGPU,n1bor/bitcoin,untrustbank/litecoin,midnightmagic/bitcoin,peercoin/peercoin,monacoinproject/monacoin,vmp32k/litecoin,achow101/bitcoin,namecoin/namecoin-core,DigitalPandacoin/pandacoin,wellenreiter01/Feathercoin,globaltoken/globaltoken,RHavar/bitcoin,untrustbank/litecoin,gjhiggins/vcoincore,vertcoin/vertcoin,qtumproject/qtum,jlopp/statoshi,paveljanik/bitcoin,jmcorgan/bitcoin,gjhiggins/vcoincore,sebrandon1/bitcoin,instagibbs/bitcoin,achow101/bitcoin,fujicoin/fujicoin,practicalswift/bitcoin,vertcoin/vertcoin,fujicoin/fujicoin,GlobalBoost/GlobalBoost,MeshCollider/bitcoin,namecoin/namecore,randy-waterhouse/bitcoin,myriadteam/myriadcoin,jamesob/bitcoin,randy-waterhouse/bitcoin,joshrabinowitz/bitcoin,MeshCollider/bitcoin,jamesob/bitcoin,OmniLayer/omnicore,RHavar/bitcoin,jambolo/bitcoin,particl/particl-core,BTCGPU/BTCGPU,digibyte/digibyte,fujicoin/fujicoin,fanquake/bitcoin,Sjors/bitcoin,Flowdalic/bitcoin,domob1812/huntercore