jdk10 RFR of JDK-8180732: add test to check temp file permission

[Hamlin Li]

Would you please review the below patch?

bug: https://bugs.openjdk.java.net/browse/JDK-8180732
webrev: http://cr.openjdk.java.net/~mli/8180732/webrev.00/

Thank you
-Hamlin