Bug 1021: Add OculusSDK binding / Basic OVR support

Bring-up test only initializes the ovrHmdHandle
data structure by OVR native code.
    See com.jogamp.oculusvr.OVRVersion

Current evaluation build compiles all OVR-SDK source
files itself w/o using provided libovr.a.
We also skip the GL dependent renderer of the SDK,
i.e. we prefer to utilize our JOGL 'barrel distortion' renderer.
This eases the 'chicken-egg' problem of OVR SDK dependencies,
i.e. libGL, libGLESv2 .. etc

Since the OVR source code is C++, we may still have to figure out
how to / and whether we shall link libstdc++ statically
to remove platform dependencies.
Right now we link libstdc++ statically if using GCC,
see  make/build-oculusvr.xml (hackish .. TODO: better way to include all symbols).

Same consideration applies to GNU/Linux and libudev.so dependency,
since there are:
    - libudev.so.0 and (Older distri's)
    - libudev.so.1 (Debian8, ..)

...

Produced JAR artifacts are
    - jar/atomic/oculusvr.jar
    - jar/atomic/oculusvr-natives-<os.and.arch>.jar

i.e. only in 'atomic' variants to not bloat the default 'all' JAR files.

....

make/build-oculusvr.xml Notes:
    - Currently native build only enabled on GNU/Linux (isLinux)
    - Force disable native build via property 'c.build.oculusvr.skip'

1 files changed, 30 insertions, 0 deletions

diff --git a/src/oculusvr/native/OVRImplMisc.cpp b/src/oculusvr/native/OVRImplMisc.cpp
new file mode 100644
index 000000000..08ebddf62
--- /dev/null
+++ b/src/oculusvr/native/OVRImplMisc.cpp
@@ -0,0 +1,30 @@
+#include "OVR_CAPI.h"
+
+#include "CAPI_DistortionRenderer.h"
+
+namespace OVR { namespace CAPI {
+
+    /**
+     * Index is: apiConfig->Header.API, with
+     *   ovrRenderAPIConfig * apiConfig
+     *   ovrRenderAPIConfigHeader Header 
+     *   ovrRenderAPIType Header.API 
+     */
+    DistortionRenderer::CreateFunc DistortionRenderer::APICreateRegistry[ovrRenderAPI_Count] =
+    {
+        0, // None
+        0, // None for GL - &GL::DistortionRenderer::Create,
+        0, // Android_GLES
+        0, // D3D9
+        0, // D3D10
+        0  // D3D11
+    };
+
+}} // namespace OVR::CAPI
+
+//
+// TBD: Replace stdc++ for compatibility !
+// 
+// This is not enough:
+// extern "C" void __cxa_pure_virtual() { while (1); }
+