HP-UX ,AIX and MVS support added to native JDBC-JCA Driver

Quote from the build_native.xml

Currently Supported Platforms:
   Platform        Compiler/Linker
   AIX             xlC (Visual Age compiler)
   HP-UX           aCC (HP aCC+ compiler)
   Linux           GCC
   MVS z/OS        os390 (c++)
   Solaris         GCC, CC (Sun ONE compiler)
   Windows         MSVC 6

MVS Requirements:
=================
Jaybird was successfully built on MVS using z/OS. Several steps were
necessary to work around the ASCII/EBCDIC character issues.