qtbase: respect ld-is-gold DISTRO_FEATURES (do it here before...

qtbase: respect ld-is-gold DISTRO_FEATURES (do it here before https://patches.openembedded.org/patch/140727/ gets upstreamed in meta-qt5)

recipes-qt/qt5/qtbase_git.bbappend

@@ -9,5 +9,5 @@ PACKAGECONFIG_append = "gles2 mtdev sql-sqlite glib fontconfig"
 PACKAGECONFIG_append_qemux86 = " eglfs gbm kms"
 RDEPENDS_${PN}_append_qemux86 = "vboxguestdrivers libegl-gallium libgbm-gallium"
 
-QT_CONFIG_FLAGS += "-no-qpa-platform-guard"
+QT_CONFIG_FLAGS += "-no-qpa-platform-guard ${@bb.utils.contains('DISTRO_FEATURES', 'ld-is-gold', '-use-gold-linker', '-no-use-gold-linker', d)}"
 PACKAGECONFIG_X11 = "${@bb.utils.contains('DISTRO_FEATURES', 'x11', 'xcb xrender xinput2 glib xkb xkbcommon-evdev', 'xkbcommon-evdev', d)}"