This makes several adjustments around what is linked into JRE.
* system giflib, libjpeg, zlib are now used unconditionally;
* libstdc++ is linked dynamically.
For full version:
* GTK+ and GNOME libraries are linked;
* Extra X11 libraries are linked;
* CUPS is linked;
* libmagic (file) is linked.
For minimal version:
* All X11 support is removed;
* Sound support is removed.
* Fonts and their support are not lined.
jre8_headless is added as a minimal build.
Overall this adds support for all things GUI into the default Java build and
removes them from the minimal build.
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