remove example package, add QT parameters to default profile

recipes-core/base-files/base-files_%.bbappend

@@ -1 +1,9 @@
-hostname = "diya"
+hostname = "diya"
+
+do_install:append () {
+    cat << EOF >> "${D}${sysconfdir}/profile"
+# QT related setting
+export QT_QPA_PLATFORM=eglfs
+export QT_QPA_EGLFS_ROTATION=90
+EOF
+}