gitignore: add *.plist (clang-check)
gitignore: add *.plist (clang-check)

Github-Pull: #15809
Rebased-From: 17be9e0e3037b60ba7bbf4b9249f2efc5e1ba9b3

vertcoin/vertcoin,bespike/litecoin,bespike/litecoin,untrustbank/litecoin,OmniLayer/omnicore,ahmedbodi/vertcoin,ahmedbodi/vertcoin,ahmedbodi/vertcoin,untrustbank/litecoin,qtumproject/qtum,bespike/litecoin,myriadteam/myriadcoin,qtumproject/qtum,GroestlCoin/bitcoin,ahmedbodi/vertcoin,GroestlCoin/bitcoin,vertcoin/vertcoin,GroestlCoin/bitcoin,GroestlCoin/GroestlCoin,GroestlCoin/bitcoin,ahmedbodi/vertcoin,bespike/litecoin,vertcoin/vertcoin,GroestlCoin/GroestlCoin,qtumproject/qtum,OmniLayer/omnicore,myriadcoin/myriadcoin,myriadcoin/myriadcoin,GroestlCoin/bitcoin,qtumproject/qtum,bespike/litecoin,GroestlCoin/GroestlCoin,OmniLayer/omnicore,GroestlCoin/GroestlCoin,vertcoin/vertcoin,myriadcoin/myriadcoin,qtumproject/qtum,vertcoin/vertcoin,myriadcoin/myriadcoin,GroestlCoin/bitcoin,myriadteam/myriadcoin,qtumproject/qtum,qtumproject/qtum,myriadteam/myriadcoin,untrustbank/litecoin,myriadcoin/myriadcoin,GroestlCoin/GroestlCoin,OmniLayer/omnicore,vertcoin/vertcoin,OmniLayer/omnicore,untrustbank/litecoin,ahmedbodi/vertcoin,OmniLayer/omnicore,untrustbank/litecoin,myriadteam/myriadcoin,GroestlCoin/GroestlCoin,myriadteam/myriadcoin,untrustbank/litecoin,myriadcoin/myriadcoin,bespike/litecoin,myriadteam/myriadcoin