QMAKE_LIBDIR issues


git-svn-id: svn://svn.code.sf.net/p/qwt/code/branches/qwt-6.1-multiaxes@2056 29e17f8d-cf37-471e-a288-72cc03a76eda
duplicated setting of warn_on removed


git-svn-id: svn://svn.code.sf.net/p/qwt/code/branches/qwt-6.1-multiaxes@2061 29e17f8d-cf37-471e-a288-72cc03a76eda