package/qt5/qt5virtualkeyboard: really configure language layouts

Commit "170777f342 package/qt5/qt5virtualkeyboard: convert to qmake
infrastructure" changed most but not all <pkg>_QMAKEFLAGS to
<pkg>_CONF_OPTS.

As a consequence, BR2_PACKAGE_QT5VIRTUALKEYBOARD_LANGUAGE_LAYOUTS is
ignored and all layouts are compiled in.
Some layouts have different licenses (e.g. pinying), so the license
information for a build that is configured to not include such layouts
is wrong.

Change the remaining _QMAKEFLAGS entry, fixing the config for which
language layouts are compiled and installed.

Cc: Giulio Benetti <giulio.benetti@benettiengineering.com>
Cc: Julien Corjon <corjon.j@ecagroup.com>
Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/qt5/qt5virtualkeyboard/qt5virtualkeyboard.mk

@@ -16,7 +16,7 @@ QT5VIRTUALKEYBOARD_LICENSE_FILES = LICENSE.GPL3
 
 QT5VIRTUALKEYBOARD_LANGUAGE_LAYOUTS = $(call qstrip,$(BR2_PACKAGE_QT5VIRTUALKEYBOARD_LANGUAGE_LAYOUTS))
 ifneq ($(strip $(QT5VIRTUALKEYBOARD_LANGUAGE_LAYOUTS)),)
-QT5VIRTUALKEYBOARD_QMAKEFLAGS += CONFIG+="$(foreach lang,$(QT5VIRTUALKEYBOARD_LANGUAGE_LAYOUTS),lang-$(lang))"
+QT5VIRTUALKEYBOARD_CONF_OPTS += CONFIG+="$(foreach lang,$(QT5VIRTUALKEYBOARD_LANGUAGE_LAYOUTS),lang-$(lang))"
 
 ifneq ($(filter ja_JP all,$(QT5VIRTUALKEYBOARD_LANGUAGE_LAYOUTS)),)
 QT5VIRTUALKEYBOARD_LICENSE += , Apache-2.0 (openwnn)