testcocoon-related tests were updated for \ vs /
directory separators.  testcocoon scripts were also updated
to use canonpath() where appropriate, so that the directory
separators are canonicalized.

License checker test was updated to avoid usage of symlink(),
which is not available on Windows.

The license checker itself was updated to avoid opening
directories.  On Linux, opening directories for read via open()
is fine; on Windows, it results in "permission denied".

Change-Id: I0bd2dd9c8d1c07fbed0222ca223953dd378fd502
Sanity-Review: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Toby Tomkins <toby.tomkins@nokia.com>
Reviewed-by: Sergio Ahumada <sergio.ahumada@nokia.com>