systemd-machine-units: add bbappend for meta-selftest

(From OE-Core rev: 797ab6d3237c3248778ea3c9304e92dcc94a67da)

Signed-off-by: Vyacheslav Yurkov <uvv.mail@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-selftest/recipes-test/systemd-machine-units/systemd-machine-units_%.bbappend

@@ -0,0 +1,2 @@
+# This bbappend is used to alter the recipe using the test_recipe.inc file created by tests.
+include test_recipe.inc