Compile qwt with QT_NO_INCLUDE_WARN
Compile qwt with QT_NO_INCLUDE_WARN

This should silence many warnings from extlibs/qwt-6.0.1 such as:

    warning: "Inclusion of header files from include/Qt is deprecated."

that arise with some versions of Qt.


Former-commit-id: db98fadbc547aea1be171763f2e993184ea5bc4d
hdeling/sofa,Anatoscope/sofa,Anatoscope/sofa,Anatoscope/sofa,Anatoscope/sofa,FabienPean/sofa,hdeling/sofa,hdeling/sofa,hdeling/sofa,FabienPean/sofa,FabienPean/sofa,Anatoscope/sofa,hdeling/sofa,Anatoscope/sofa,Anatoscope/sofa,hdeling/sofa,Anatoscope/sofa,hdeling/sofa,FabienPean/sofa,hdeling/sofa,hdeling/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,hdeling/sofa,Anatoscope/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa