CBE: improve noreturn definition, support noreturn on MSVC
CBE: improve noreturn definition, support noreturn on MSVC

andrewrk/zig,raulgrell/zig,raulgrell/zig,raulgrell/zig,zig-lang/zig,andrewrk/zig,raulgrell/zig,zig-lang/zig,raulgrell/zig,zig-lang/zig