Added -pipe to gcc build under Linux
Added -pipe to gcc build under Linux


openscenegraph/osg,tomasthoresen/osg,marchelbling/osg,tomasthoresen/osg,scrawl/osg,artoolkit/osg,openscenegraph/osg,marchelbling/osg,jtorresfabra/osg,jtorresfabra/osg,scrawl/osg,scrawl/osg,tomasthoresen/osg,openscenegraph/osg,tomasthoresen/osg,openscenegraph/osg,artoolkit/osg,scrawl/osg,artoolkit/osg,artoolkit/osg,jtorresfabra/osg,marchelbling/osg,marchelbling/osg,jtorresfabra/osg