hedgeroid: adjust build.xml: fix app name; set java version; print hint if sdk build.xml is missing
<RCC>
<qresource prefix="/">
<file>main.qml</file>
<file>Page1.qml</file>
<file>Page1Form.ui.qml</file>
<file>qtquickcontrols2.conf</file>
<file>res/iconTime.png</file>
</qresource>
</RCC>