Since the PATH/LD_LIBRARY_PATH depend on the LIBS variable,
we need to emit a environment changed signal after parsing

Change-Id: Ib4e276874dd6a8529c81b7ce10c53773c39cf508
Reviewed-on: http://codereview.qt.nokia.com/317


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Daniel Teske <daniel.teske@nokia.com>