Changes

www/index.html: Update links and text OpenGL ES 3.x -> OpenGL ES 3.2

make/doc/jogl/spec-overview.html, make/config/jogl/gl-common.cfg: OpenGL
ES 3.1 -> 3.2

jogl: complete audit of code for unneeded calls to .intern()
Completes task from Bug1059. These calls are not needed as the VM 
implicitly interns String constants when a class is loaded.
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>

Change BCM VC IV detection to handle presence of vc4 DRI module
The recent Raspbian release comes with a vc4 kernel module that can be
activated with a device tree overlay. In this case, we want to use the
DRI & Mesa / Gallium3D driver instead of the BCM VC IV one, whose
userspace library remains in /opt/vc.

WWW: update description of jaamsim on the website.
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>

Shows all information of the default graphics device in JoglVersion, bug
1294

Bug 1295: Add linux-aarch64 GNU/Linux AArch64 support
scripts/make.jogl.all.linux-aarch64-cross.sh:
 New crosscompile script
build-common.xml:
 Add SWT compile hack for isLinuxARM64

Change library search order for Broadcom VC IV graphics
When the VC4 DRM driver isn't loaded, we want to load the VC IV GLES2
driver, which is - unfortunately - only available as libGLESv2.so.

HowToBuild: Add Debian 9 Notes

Bug 1299: Fix Warning when using JOGL on Mac OS X El Capitan
It turned out to be a missing CATransaction, i.e. the native
create/destroy commands had to be encapsulated within [CATransaction
begin] and [CATransaction commit] causing the uncommitted CATransaction.

Version Semantics Test: Bump for 2.4.0 -> 2.3.x
We are still on the 2.3.x branch for the next release

Bug 1290: Expand query whether BCM IV is being used, exclude
'/dev/dri/card0'
Also refactor query to jogamp.nativewindow.BcmVCArtifacts