8132919: Put compiler tests in packagesReviewed-by: vlivanov, dpochepkContributed-by: igor.ignatyev@oracle.com
8139170: JVMCI refreshReviewed-by: kvn
8136421: JEP 243: Java-Level JVM Compiler InterfaceReviewed-by: ihse, alanb, roland, coleenp, iveresov, kvn, kbarrett