Add OZSWcups 2.4.19, OZSWlibXtst 1.2.5, OZSWopenjdk7 u351, OZSWopenjdk8 u492 stub.

OZSWcups: Cups printing library + headers, required by JDK awt.
OZSWlibXtst: X11 Test extension (XTestFakeKeyEvent etc.), required by awt_Robot.
OZSWopenjdk7: OpenJDK 7u351 built with Sun Studio 12 from /usr/jdk/latest.
  Build fixes:
  - CORBA ObjectStreamClass.java: removed sun.misc.JavaSecurityAccess (absent in JDK 6 boot)
  - Defs-solaris.gmk OPENWIN_HOME=/opt/ozsw (Sun Studio finds X11 via /usr/include/X11 symlink)
  - splashscreen Makefile: added -liconv for GNU libiconv symbols
  - xawt FILES_c_unix.gmk: added AlphaMath.c so div8table is in libmawt.so
  - CUPS versioning.h: replaced variadic macros with object-like macros (Sun Studio rejects ...)
  - All file copies: replaced with /opt/ozsw versions (zip/unzip)
  - Build script: stage LICENSE in WORKROOTDIR/build-global for findlicensefile
OZSWopenjdk8: stub for next milestone (will use OZSWopenjdk7 as boot JDK).