Add Helium 7 support for package builds. - During operation, if last.major.helium.version is detected as 7.0 then it will use new sbsinput mechanism. - Restore sf-postbuild dependency on sf-build-noprep target

<?xml version="1.0"?>

<project name="SYMBIAN3-PROPS">
  <property name="sf.spec.baseline.location" value="\\bishare\Releases\PDK_3.0.d"/>
</project>