libqt4codegen: escape backslashes when generating doc-comments from the spec
libqt4codegen: escape backslashes when generating doc-comments from the spec

Otherwise, doxygen thinks they're a doxygen command and gets confused.

freedesktop-unofficial-mirror/telepathy__telepathy-qt,tiagosh/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt4,TelepathyQt/telepathy-qt,special/telepathy-qt-upstream,TelepathyQt/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt4,tiagosh/telepathy-qt,anantkamath/telepathy-qt,special/telepathy-qt-upstream,TelepathyQt/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt,special/telepathy-qt-upstream,tiagosh/telepathy-qt,detrout/telepathy-qt,tiagosh/telepathy-qt,TelepathyIM/telepathy-qt,anantkamath/telepathy-qt,TelepathyIM/telepathy-qt,TelepathyIM/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt,TelepathyIM/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt4,detrout/telepathy-qt,detrout/telepathy-qt,TelepathyIM/telepathy-qt,anantkamath/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt4,TelepathyQt/telepathy-qt