Mimetypes: Make compile with namespaced Qt

Change-Id: I022b4cedee85b60a444241dc3b373aaa2fb924af
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/libs/utils/mimetypes2/mimeglobpattern_p.h

@@ -171,4 +171,6 @@ public:
 
 } // namespace Utils
 
+QT_BEGIN_NAMESPACE
 Q_DECLARE_SHARED(Utils::MimeGlobPattern)
+QT_END_NAMESPACE

src/libs/utils/mimetypes2/mimemagicrule_p.h

@@ -141,4 +141,6 @@ private:
 
 } // namespace Utils
 
+QT_BEGIN_NAMESPACE
 Q_DECLARE_SHARED(Utils::MimeMagicRule)
+QT_END_NAMESPACE

src/libs/utils/mimetypes2/mimemagicrulematcher_p.h

@@ -90,4 +90,6 @@ private:
 
 } // namespace Utils
 
+QT_BEGIN_NAMESPACE
 Q_DECLARE_SHARED(Utils::MimeMagicRuleMatcher)
+QT_END_NAMESPACE

src/libs/utils/mimetypes2/mimetype.h

@@ -132,9 +132,11 @@ protected:
 
 } // namespace Utils
 
+QT_BEGIN_NAMESPACE
 #ifndef QT_NO_DEBUG_STREAM
 class QDebug;
 QTCREATOR_UTILS_EXPORT QDebug operator<<(QDebug debug, const Utils::MimeType &mime);
 #endif
 
 Q_DECLARE_SHARED(Utils::MimeType)
+QT_END_NAMESPACE