RFR [9] 8145544: Move sun.misc.VM to jdk.internal.misc

[Chris Hegarty]

sun.misc.VM provides a low-level interface for a small number
of specific operations with the VM. In preparation for JEP 260,
this class should be moved out of sun.misc and located in a
non-exported package [.

http://cr.openjdk.java.net/~chegar/8145544/00/

Note: as in other areas some tests that require access to
internal APIs have been updated to use types from a more
stable package, sun.security.x509.

-Chris.

[1] https://bugs.openjdk.java.net/browse/JDK-8145544