oniro-linux.conf: Propagate openharmony distro feature to native/nativesdk

This is required on recipes like
oniro-openharmony-toolchain-integration provided by meta-openharmony.

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

meta-oniro-core/conf/distro/oniro-linux.conf

@@ -112,3 +112,6 @@ ENABLE_UART ?= "1"
 GPU_MEM:raspberrypi4-64 = "128"
 
 SPLASH = "psplash-oniro"
+
+DISTRO_FEATURES_FILTER_NATIVE:append = " openharmony"
+DISTRO_FEATURES_FILTER_NATIVESDK:append = " openharmony"