use shlex to split the command args

Change-Id: Ie55f9ef00e4d15a7755587c34970693eedf8eb4f
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
Do not build developer documentation for qt creator

Task-number: QTBUG-31106

Change-Id: If39b3d7c0d88aadd7814ac2cade245a01d690c06
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>