terminal: Add sleep in pid-monitor loop

Monitoring the process started by gnome-terminal was
spinning in a busy-loop. Insert some sleeping so that
we don't eat all the cpu.

(From OE-Core rev: 314937429d700204f296cfd1c0c5f215a2e5b939)

Signed-off-by: Jacob Kroon <jacob.kroon@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oe/terminal.py

@@ -76,9 +76,11 @@ class Gnome(XTerminal):
         finally:
             os.unlink(pidfile)
 
+        import time
         while True:
             try:
                 os.kill(pid, 0)
+                time.sleep(0.1)
             except OSError:
                return