Send output to debugger client (#1955)

Sending the output to the debugger client, at the moment only the JS side prints are sent over.

JerryScript-DCO-1.0-Signed-off-by: Daniel Balla dballa@inf.u-szeged.hu

tests/debugger/do_display.expected

@@ -14,6 +14,7 @@ Non-negative integer number expected, 0 turns off this function
 Stopped at breakpoint:1 tests/debugger/do_display.js:15 (in a() at line:15, col:1)
 (jerry-debugger) display 2
 (jerry-debugger) c
+out: hi
 Stopped at breakpoint:2 tests/debugger/do_display.js:16 (in b() at line:16, col:1)
 Source: tests/debugger/do_display.js
   15   function a() { print("hi"); }
@@ -21,6 +22,7 @@ Source: tests/debugger/do_display.js
   17   function c() { print("hello"); }
 (jerry-debugger) display 5435
 (jerry-debugger) c
+out: welcome
 Stopped at breakpoint:3 tests/debugger/do_display.js:17 (in c() at line:17, col:1)
 Source: tests/debugger/do_display.js
    1   // Copyright JS Foundation and other contributors, http://js.foundation
@@ -48,5 +50,7 @@ Source: tests/debugger/do_display.js
   23   d();
 (jerry-debugger) display 0
 (jerry-debugger) c
+out: hello
 Stopped at breakpoint:4 tests/debugger/do_display.js:18 (in d() at line:18, col:1)
 (jerry-debugger) c
+out: goodbye