oniro-tests: enable empty root password

oniro-image-base-tests and oniro-image-extra-tests needs an empty root password to correctly run their tests, this is enabled by debug-tweaks.

Related to #673

Signed-off-by: Davide Gardenal davide.gardenal@huawei.com

meta-oniro-core/recipes-core/images/oniro-image-base-tests.bb

@@ -13,8 +13,8 @@ IMAGE_INSTALL:append = "\
     kernel-selftest \
 "
 
-# This adds ptest packages to the image
-EXTRA_IMAGE_FEATURES:append = " ptest-pkgs"
+# This adds ptest packages to the image, and enables empty root password
+EXTRA_IMAGE_FEATURES:append = " ptest-pkgs debug-tweaks"
 
 # For testing purposes, we want to have an extra ext4 format for the root
 # filesystem.