build: add /usr/local/ to LCOV_FILTER_PATTERN for macOS builds
build: add /usr/local/ to LCOV_FILTER_PATTERN for macOS builds

With this commit, the files in /usr/local/ will not be included in
`make cov` or `make cov_fuzz` coverage reports. This behavior could
be observed when generating the reports on macOS with brew-installed
clang.

kallewoof/bitcoin,prusnak/bitcoin,prusnak/bitcoin,EthanHeilman/bitcoin,jnewbery/bitcoin,dscotese/bitcoin,dscotese/bitcoin,jnewbery/bitcoin,practicalswift/bitcoin,anditto/bitcoin,yenliangl/bitcoin,Xekyo/bitcoin,litecoin-project/litecoin,tecnovert/particl-core,andreaskern/bitcoin,GroestlCoin/bitcoin,jlopp/statoshi,instagibbs/bitcoin,achow101/bitcoin,GroestlCoin/bitcoin,litecoin-project/litecoin,litecoin-project/litecoin,MarcoFalke/bitcoin,domob1812/bitcoin,litecoin-project/litecoin,sstone/bitcoin,ajtowns/bitcoin,bitcoin/bitcoin,jamesob/bitcoin,domob1812/namecore,ElementsProject/elements,kallewoof/bitcoin,bitcoin/bitcoin,Sjors/bitcoin,sstone/bitcoin,MeshCollider/bitcoin,andreaskern/bitcoin,particl/particl-core,mm-s/bitcoin,lateminer/bitcoin,fanquake/bitcoin,tecnovert/particl-core,Xekyo/bitcoin,MarcoFalke/bitcoin,sstone/bitcoin,jlopp/statoshi,jamesob/bitcoin,particl/particl-core,domob1812/namecore,andreaskern/bitcoin,alecalve/bitcoin,domob1812/bitcoin,bitcoin/bitcoin,instagibbs/bitcoin,dscotese/bitcoin,sipsorcery/bitcoin,namecoin/namecoin-core,bitcoin/bitcoin,tecnovert/particl-core,EthanHeilman/bitcoin,domob1812/namecore,sstone/bitcoin,prusnak/bitcoin,instagibbs/bitcoin,Sjors/bitcoin,namecoin/namecore,GroestlCoin/bitcoin,jambolo/bitcoin,bitcoinsSG/bitcoin,mruddy/bitcoin,domob1812/namecore,sstone/bitcoin,bitcoinknots/bitcoin,GroestlCoin/GroestlCoin,alecalve/bitcoin,MarcoFalke/bitcoin,dscotese/bitcoin,andreaskern/bitcoin,prusnak/bitcoin,MarcoFalke/bitcoin,pataquets/namecoin-core,yenliangl/bitcoin,AkioNak/bitcoin,rnicoll/dogecoin,jambolo/bitcoin,lateminer/bitcoin,rnicoll/bitcoin,dscotese/bitcoin,fanquake/bitcoin,EthanHeilman/bitcoin,n1bor/bitcoin,JeremyRubin/bitcoin,pstratem/bitcoin,instagibbs/bitcoin,ajtowns/bitcoin,cdecker/bitcoin,jlopp/statoshi,ElementsProject/elements,mruddy/bitcoin,lateminer/bitcoin,fujicoin/fujicoin,fujicoin/fujicoin,JeremyRubin/bitcoin,alecalve/bitcoin,mm-s/bitcoin,qtumproject/qtum,rnicoll/dogecoin,bitcoinknots/bitcoin,sipsorcery/bitcoin,mm-s/bitcoin,jnewbery/bitcoin,alecalve/bitcoin,particl/particl-core,mruddy/bitcoin,bitcoinknots/bitcoin,anditto/bitcoin,namecoin/namecore,AkioNak/bitcoin,apoelstra/bitcoin,kallewoof/bitcoin,sipsorcery/bitcoin,AkioNak/bitcoin,apoelstra/bitcoin,domob1812/bitcoin,particl/particl-core,qtumproject/qtum,GroestlCoin/GroestlCoin,practicalswift/bitcoin,sipsorcery/bitcoin,ajtowns/bitcoin,anditto/bitcoin,mruddy/bitcoin,pataquets/namecoin-core,ajtowns/bitcoin,yenliangl/bitcoin,qtumproject/qtum,ajtowns/bitcoin,tecnovert/particl-core,fujicoin/fujicoin,mruddy/bitcoin,jamesob/bitcoin,bitcoin/bitcoin,mm-s/bitcoin,GroestlCoin/GroestlCoin,n1bor/bitcoin,achow101/bitcoin,apoelstra/bitcoin,particl/particl-core,jambolo/bitcoin,jambolo/bitcoin,jambolo/bitcoin,MarcoFalke/bitcoin,pataquets/namecoin-core,n1bor/bitcoin,jlopp/statoshi,fanquake/bitcoin,namecoin/namecore,fanquake/bitcoin,cdecker/bitcoin,domob1812/namecore,pataquets/namecoin-core,qtumproject/qtum,tecnovert/particl-core,jlopp/statoshi,mm-s/bitcoin,dscotese/bitcoin,pataquets/namecoin-core,rnicoll/dogecoin,GroestlCoin/bitcoin,jamesob/bitcoin,GroestlCoin/GroestlCoin,pstratem/bitcoin,JeremyRubin/bitcoin,Xekyo/bitcoin,jnewbery/bitcoin,rnicoll/bitcoin,prusnak/bitcoin,jonasschnelli/bitcoin,n1bor/bitcoin,jonasschnelli/bitcoin,lateminer/bitcoin,GroestlCoin/GroestlCoin,MeshCollider/bitcoin,cdecker/bitcoin,cdecker/bitcoin,bitcoinknots/bitcoin,pstratem/bitcoin,JeremyRubin/bitcoin,kallewoof/bitcoin,ElementsProject/elements,ElementsProject/elements,domob1812/bitcoin,ElementsProject/elements,Sjors/bitcoin,domob1812/namecore,qtumproject/qtum,namecoin/namecore,cdecker/bitcoin,practicalswift/bitcoin,practicalswift/bitcoin,practicalswift/bitcoin,rnicoll/bitcoin,jonasschnelli/bitcoin,sstone/bitcoin,jamesob/bitcoin,MeshCollider/bitcoin,ajtowns/bitcoin,lateminer/bitcoin,alecalve/bitcoin,jonasschnelli/bitcoin,mruddy/bitcoin,bitcoinsSG/bitcoin,n1bor/bitcoin,instagibbs/bitcoin,Sjors/bitcoin,AkioNak/bitcoin,Sjors/bitcoin,namecoin/namecoin-core,particl/particl-core,jnewbery/bitcoin,bitcoinsSG/bitcoin,fanquake/bitcoin,jambolo/bitcoin,anditto/bitcoin,namecoin/namecoin-core,bitcoin/bitcoin,Xekyo/bitcoin,qtumproject/qtum,fanquake/bitcoin,mm-s/bitcoin,litecoin-project/litecoin,rnicoll/dogecoin,anditto/bitcoin,practicalswift/bitcoin,MeshCollider/bitcoin,andreaskern/bitcoin,achow101/bitcoin,MeshCollider/bitcoin,MarcoFalke/bitcoin,andreaskern/bitcoin,bitcoinsSG/bitcoin,apoelstra/bitcoin,GroestlCoin/bitcoin,domob1812/bitcoin,AkioNak/bitcoin,bitcoinsSG/bitcoin,rnicoll/dogecoin,MeshCollider/bitcoin,fujicoin/fujicoin,instagibbs/bitcoin,rnicoll/bitcoin,EthanHeilman/bitcoin,sipsorcery/bitcoin,Xekyo/bitcoin,yenliangl/bitcoin,namecoin/namecoin-core,AkioNak/bitcoin,achow101/bitcoin,kallewoof/bitcoin,EthanHeilman/bitcoin,alecalve/bitcoin,pstratem/bitcoin,apoelstra/bitcoin,jamesob/bitcoin,rnicoll/bitcoin,JeremyRubin/bitcoin,domob1812/bitcoin,fujicoin/fujicoin,namecoin/namecore,jlopp/statoshi,sipsorcery/bitcoin,rnicoll/bitcoin,anditto/bitcoin,namecoin/namecoin-core,fujicoin/fujicoin,JeremyRubin/bitcoin,GroestlCoin/GroestlCoin,litecoin-project/litecoin,jonasschnelli/bitcoin,prusnak/bitcoin,kallewoof/bitcoin,yenliangl/bitcoin,pstratem/bitcoin,n1bor/bitcoin,lateminer/bitcoin,qtumproject/qtum,cdecker/bitcoin,EthanHeilman/bitcoin,Xekyo/bitcoin,apoelstra/bitcoin,pstratem/bitcoin,namecoin/namecore,achow101/bitcoin,achow101/bitcoin,bitcoinknots/bitcoin,tecnovert/particl-core,namecoin/namecoin-core,bitcoinsSG/bitcoin,yenliangl/bitcoin,pataquets/namecoin-core,GroestlCoin/bitcoin,ElementsProject/elements