8163984: Fix license and copyright headers in jdk9 under test/lib
Reviewed-by: dholmes
Contributed-by: Stanislav Smirnov <stanislav.smirnov@oracle.com>

8139170: JVMCI refresh
Reviewed-by: kvn

8136421: JEP 243: Java-Level JVM Compiler Interface
Reviewed-by: ihse, alanb, roland, coleenp, iveresov, kvn, kbarrett

8066433: Move Whitebox test library to top level repository
Summary: Moved Whitebox test library to top level repository.
Reviewed-by: iignatyev, sla, mr