fix QChar::isSpace() to handle codepoint U+0085

fix QChar::isSpace() to handle codepoint U+0085

according to the Unicode specs, code point U+0085 should be treated
like a white space character (an exceptional Cc one)

Change-Id: Ib17ae0c4d3cdafe667cafa38b645138ef24c238c
Merge-request: 32
Reviewed-by: Jiang Jiang <jiang.jiang@nokia.com>
Reviewed-on: http://codereview.qt-project.org/6158
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>