build: Bump RC to rc4
build: Bump RC to rc4

Tree-SHA512: f22375573f1737d64b62351cdec58f0f3e17d9f21b044430f366cbf272514369b73f24cc34e499e2637f0a0fa57ce5b925dd2df8ba0265b1b9c37beb7c8b8e22

litecoin-project/litecoin,litecoin-project/litecoin,qtumproject/qtum,rnicoll/dogecoin,litecoin-project/litecoin,qtumproject/qtum,rnicoll/dogecoin,litecoin-project/litecoin,rnicoll/dogecoin,litecoin-project/litecoin,qtumproject/qtum,qtumproject/qtum,litecoin-project/litecoin,rnicoll/dogecoin,qtumproject/qtum,qtumproject/qtum,rnicoll/dogecoin,qtumproject/qtum