Add the GPU rigid body pipeline from https://github.com/erwincoumans/experiments as a Bullet 3.x preview for Bullet 2.80

Extras/RigidBodyGpuPipeline/opencl/primitives/Adl/AdlStopwatch.inl

@@ -0,0 +1,59 @@
+/*
+Copyright (c) 2012 Advanced Micro Devices, Inc.  
+
+This software is provided 'as-is', without any express or implied warranty.
+In no event will the authors be held liable for any damages arising from the use of this software.
+Permission is granted to anyone to use this software for any purpose, 
+including commercial applications, and to alter it and redistribute it freely, 
+subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.
+*/
+//Originally written by Takahiro Harada
+
+
+namespace adl
+{
+
+void Stopwatch::init( const Device* deviceData )
+{
+	ADLASSERT( m_impl == 0 );
+
+	if( deviceData )
+	{
+		switch( deviceData->m_type )
+		{
+#if defined(ADL_ENABLE_CL)
+		case TYPE_CL:
+			m_impl = new StopwatchHost;//StopwatchCL
+			break;
+#endif
+#if defined(ADL_ENABLE_DX11)
+		case TYPE_DX11:
+			m_impl = new StopwatchHost;//StopwatchDX11;
+			break;
+#endif
+		case TYPE_HOST:
+			m_impl = new StopwatchHost;
+			break;
+		default:
+			ADLASSERT(0);
+			break;
+		};
+	}
+	else
+	{
+		m_impl = new StopwatchHost;
+	}
+	m_impl->init( deviceData );
+}
+
+Stopwatch::~Stopwatch()
+{
+	if( m_impl == 0 ) return;
+	delete m_impl;
+}
+
+};