Add NotCheckpointSafe annotations to PhantomCleanable to
avoid blocking operations during restore in CRIU single
thread mode, and fix the failures in the
cmdLineTester_criu_nonPortableRestore tests that occur
due to blocking operations during restore in CRIU
single thread mode.
Add NotCheckpointSafe annotations to PhantomCleanable to avoid blocking operations during restore in CRIU single thread mode, and fix the failures in the cmdLineTester_criu_nonPortableRestore tests that occur due to blocking operations during restore in CRIU single thread mode.
Issue: eclipse-openj9/openj9#18399 Signed-off-by: Amarpreet Singh Amarpreet.A.Singh@ibm.com