Adapt autotest for MSVC 2015
Adapt autotest for MSVC 2015

Linking the "app without sources" autotest fails with MSVC 2015 if
stdio.h is included in one of the source files. Simply remove the
include; it is not relevant to the tested feature.

Change-Id: I99866e231fe3f412b4a0b7ff2341f17ac356da46
Reviewed-by: Jake Petroules <2d627e1cecd5435752fa500bacbe05f7cc90c369@qt.io>

qt-labs/qbs,qt-labs/qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qt-labs/qbs