ProjectExplorer: Remove references to Qt4ProjectManager namespace

Change-Id: I384110b5aa91aec903af3b4bb2a158e1f0d4c918
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/projectexplorer/buildenvironmentwidget.h

@@ -59,6 +59,6 @@ private:
     BuildConfiguration *m_buildConfiguration;
 };
 
-} // namespace Qt4ProjectManager
+} // namespace ProjectExplorer
 
 #endif // BUILDENVIRONMENTWIDGET_H

src/plugins/projectexplorer/cesdkhandler.h

@@ -103,6 +103,6 @@ inline QString CeSdkHandler::fixPaths(QString path) const
     return QDir::toNativeSeparators(path);
 }
 
-} // namespace Qt4ProjectManager
+} // namespace ProjectExplorer
 
 #endif // CE_SDK_HANDLER_H