qtwebengine: disable generate_character_data

* qtwebengine 5.8 fails to build it, because it mixes binaries for x86_64 host and x86 target when building for qemux86 on 64bit host
  https://bugreports.qt.io/browse/QTBUG-57705

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

recipes-qt/qt5/qtwebengine_git.bb

@@ -24,7 +24,7 @@ DEPENDS += " \
 "
 
 DEPENDS += "yasm-native"
-EXTRA_QMAKEVARS_PRE += "GYP_CONFIG+=use_system_yasm"
+EXTRA_QMAKEVARS_PRE += "GYP_CONFIG+=use_system_yasm GYP_CONFIG+=generate_character_data=0"
 
 # To use system ffmpeg you need to enable also libwebp, opus, vpx											    
 # Only depenedencies available in oe-core are enabled by default