8067648: JVM crashes reproducible with GCM cipher suites in GCTR doFinal Summary: Change restore mechanism in GCTR.java to avoid setting counter to null; added length check to constructor Reviewed-by: jrose, kvn, ascarpino

^build/
^dist/
^webrev
^testoutput/
/nbproject/private/
^make/netbeans/.*/build/
^make/netbeans/.*/dist/
^.hgtip
.DS_Store