getsockopt, setsockopt doesn't implement SO_RCVTIMEO,SO_SNDTIMEO for wasi:socket handles

wasi-libc/libc-bottom-half/sources/sockopt.c

Lines 464 to 470 in 7d4d3b8

    
           case SO_RCVTIMEO: // TODO wasi-sockets: emulate in wasi-libc itself 
        
           case SO_SNDTIMEO: // TODO wasi-sockets: emulate in wasi-libc itself 
        
           default: 
        
           	errno = ENOPROTOOPT; 
        
           	return -1; 
        
           } 
        
           break;

cc: @badeend, @dicej

My suggestion is to keep track of the configured timeout values in wasi-libc and update the sendto & recvfrom implementations to take them into account where they're currently calling poll_method_pollable_block

	case SO_RCVTIMEO: // TODO wasi-sockets: emulate in wasi-libc itself
	case SO_SNDTIMEO: // TODO wasi-sockets: emulate in wasi-libc itself
	default:
	errno = ENOPROTOOPT;
	return -1;
	}
	break;