6919986: [308] change size of type_index (of CLASS_EXTENDS and THROWS) from byte to short
Reviewed-by: darcy, jjg
Contributed-by: mali@csail.mit.edu, mernst@cs.washington.edu
6499119: Created package-info class file modeled improperly
6920317: package-info.java file has to be specified on the javac cmdline, else it will not be avail.
Reviewed-by: darcy