package/kf5: fix _LICENSE_FILE -> _LICENSE_FILES typos

This fixes WARNINGs in make legal-info of the kind:
    WARNING: kf5-extra-cmake-modules-5.47.0: cannot save license
    (KF5_EXTRA_CMAKE_MODULES_LICENSE_FILES not defined)

Signed-off-by: Nicolas Carrier <nicolas.carrier@orolia.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit a6c594b8dc0579c50893a176affe63cd34002eb1)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/kf5/kf5-extra-cmake-modules/kf5-extra-cmake-modules.mk

@@ -8,7 +8,7 @@ KF5_EXTRA_CMAKE_MODULES_VERSION = $(KF5_VERSION)
 KF5_EXTRA_CMAKE_MODULES_SITE = $(KF5_SITE)
 KF5_EXTRA_CMAKE_MODULES_SOURCE = extra-cmake-modules-$(KF5_EXTRA_CMAKE_MODULES_VERSION).tar.xz
 KF5_EXTRA_CMAKE_MODULES_LICENSE = BSD-3-Clause
-KF5_EXTRA_CMAKE_MODULES_LICENSE_FILE = COPYING-CMAKE-SCRIPTS
+KF5_EXTRA_CMAKE_MODULES_LICENSE_FILES = COPYING-CMAKE-SCRIPTS
 
 KF5_EXTRA_CMAKE_MODULES_DEPENDENCIES = host-pkgconf
 KF5_EXTRA_CMAKE_MODULES_INSTALL_STAGING = YES

package/kf5/kf5-modemmanager-qt/kf5-modemmanager-qt.mk

@@ -8,7 +8,7 @@ KF5_MODEMMANAGER_QT_VERSION = $(KF5_VERSION)
 KF5_MODEMMANAGER_QT_SITE = $(KF5_SITE)
 KF5_MODEMMANAGER_QT_SOURCE = modemmanager-qt-$(KF5_MODEMMANAGER_QT_VERSION).tar.xz
 KF5_MODEMMANAGER_QT_LICENSE = LGPL-2.1+
-KF5_MODEMMANAGER_QT_LICENSE_FILE = COPYING.LIB
+KF5_MODEMMANAGER_QT_LICENSE_FILES = COPYING.LIB
 
 KF5_MODEMMANAGER_QT_DEPENDENCIES = kf5-extra-cmake-modules modem-manager qt5base
 KF5_MODEMMANAGER_QT_INSTALL_STAGING = YES

package/kf5/kf5-networkmanager-qt/kf5-networkmanager-qt.mk

@@ -8,7 +8,7 @@ KF5_NETWORKMANAGER_QT_VERSION = $(KF5_VERSION)
 KF5_NETWORKMANAGER_QT_SITE = $(KF5_SITE)
 KF5_NETWORKMANAGER_QT_SOURCE = networkmanager-qt-$(KF5_NETWORKMANAGER_QT_VERSION).tar.xz
 KF5_NETWORKMANAGER_QT_LICENSE = LGPL-2.1+
-KF5_NETWORKMANAGER_QT_LICENSE_FILE = COPYING.LIB
+KF5_NETWORKMANAGER_QT_LICENSE_FILES = COPYING.LIB
 
 KF5_NETWORKMANAGER_QT_DEPENDENCIES = kf5-extra-cmake-modules network-manager qt5base
 KF5_NETWORKMANAGER_QT_INSTALL_STAGING = YES