macdeploy: alternative info to download the macOS SDK
macdeploy: alternative info to download the macOS SDK

The previous link wasn't accessible for me, this adds some instructions
given to me by Hebasto on #bitcoin-core-builds as well as a shasum for
the archive to quickly check the downloaded one is the right one before
processing with the entire Guix build.

This also corrects a link to an older version of the SDK currently in
use.

Signed-off-by: Antoine Poinsot <0fdf30a351670cde318d282b5fede3c3548275bc@protonmail.com>

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