bytemark bench: turn off blinking cursor

tests/benchmark/arch-bytemark.js

@@ -42,8 +42,8 @@ emulator.bus.register("emulator-started", function()
     }
 
     setTimeout(() => {
-        const set = exclude_tests.map(name => `echo ${name}=0 >> CMD && `).join("");
-        emulator.serial0_send(`cd nbench && touch CMD && ${set} ./nbench -cCMD\n`);
+        const set = exclude_tests.map(name => `echo ${name}=0 >> CMD`).join(" && ");
+        emulator.serial0_send(`echo 0 > /sys/class/graphics/fbcon/cursor_blink && cd nbench && touch CMD && ${set} && ./nbench -cCMD\n`);
     }, 1000);
 });