qt5multimedia: add license info for examples fftreal library

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/qt5/qt5multimedia/qt5multimedia.hash

@@ -14,3 +14,4 @@ sha256 245248009fd0af1725d183248380e476c1283383909358a13686606352bf2a17 LICENSE.
 sha256 1996a36160b2158c2be264d2ddfa6148ebe0f1ececff55aca8d754a1ddcc7bb8 LICENSE.LGPLv21
 sha256 438c1f9a2b256e47dac33249f2ad6d4a9df643f1ec5312216d528a2f7ad82084 LGPL_EXCEPTION.txt
 sha256 5ceb37d1c7c1d92878b82af3c0fd5558087f3d5a08a3a4d43850bad4ad265a52 LICENSE.LGPLv3
+sha256 c1d75c15db4409bcbb182180d582f410a263dc9a631cd546b256e95f1da42165 examples/multimedia/spectrum/3rdparty/fftreal/license.txt

package/qt5/qt5multimedia/qt5multimedia.mk

@@ -71,6 +71,8 @@ endef
 endif
 
 ifeq ($(BR2_PACKAGE_QT5BASE_EXAMPLES),y)
+QT5MULTIMEDIA_LICENSE := $(QT5MULTIMEDIA_LICENSE), LGPL-2.1+ (examples/multimedia/spectrum/3rdparty/fftreal)
+QT5MULTIMEDIA_LICENSE_FILES += examples/multimedia/spectrum/3rdparty/fftreal/license.txt
 define QT5MULTIMEDIA_INSTALL_TARGET_EXAMPLES
 	cp -dpfr $(STAGING_DIR)/usr/lib/qt/examples/multimedia* $(TARGET_DIR)/usr/lib/qt/examples/
 endef