megasync: 4.2.3.0 -> 4.2.5.0
megasync: 4.2.3.0 -> 4.2.5.0

Also pull in an (as of yet unmerged) upstream patch to fix
the build, it was failing on both .3 and .5

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs