qwt: add license information

Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/qwt/qwt.mk

@@ -10,6 +10,9 @@ QWT_SITE = http://downloads.sourceforge.net/project/qwt/qwt/$(QWT_VERSION)
 QWT_INSTALL_STAGING = YES
 QWT_DEPENDENCIES = qt
 
+QWT_LICENSE = LGPLv2.1 with exceptions
+QWT_LICENSE_FILES = COPYING
+
 QWT_CONFIG = 's%QWT_INSTALL_PREFIX.*/usr/local/.*%QWT_INSTALL_PREFIX = /usr%'
 QWT_CONFIG += -e 's/^.*QWT_CONFIG.*QwtDesigner.*$$/\# QWT_CONFIG += QwtDesigner/'
 QWT_CONFIG += -e 's%/features%/mkspecs/features%'