std/event/tcp.zig: remove promise_symbol from suspend and use @handle();
std/event/tcp.zig: remove promise_symbol from suspend and use @handle();

Tracking Issue #1296 ;

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