Added providers lib dir to the lib search path so grass plugin would build

git-svn-id: http://svn.osgeo.org/qgis/trunk@6063 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: timlinux

settings.pro

@@ -166,6 +166,7 @@ win32:LIBS += -lWs2_32
 #win32:LIBS+=-LC:\MinGW\lib
 win32:LIBS+=-LC:\msys\local\lib
 win32:LIBS+=-L$${DESTDIR}
+win32:LIBS+=-L$${DESTDIR}/lib/qgis
 linux-g++:LIBS+=-L$${DESTDIR}/lib
 linux-g++:LIBS+=-L/usr/lib/ccache/lib
 macx:LIBS+=-L$${QGISLIBDIR}