QAbstractSocket: make build with debug statements compile

Otherwise we would get
qabstractsocket.cpp:2224:24: error: unknown escape sequence: '\c' [-Werror]

Change-Id: I757ff2aa1c46bbba7f0c0b93f49c2f9d84927b19
Reviewed-by: Richard J. Moore <rich@kde.org>
Doc: corrected broken links

Links fixed:  Extra Filters
              Basic Tools
              blockingfortuneclient
              Thread Support
              Drag and drop examples
              qBinaryFind
              qmake common project types
              imagegestures
Task-number: QTBUG-34749
Change-Id: Ib93dda00716dc596db327fee5b97e110a9f27fa7
Reviewed-by: Martin Smith <martin.smith@digia.com>
ensure that output path is normalized

Task-number: QTBUG-35131
Change-Id: I39b345db649470a926e25eb2a9b38794205b9212
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>