can now use renderdoc on linux with OpenGL back-end

src/glcontext_glx.cpp

@@ -169,12 +169,12 @@ namespace bgfx { namespace gl
 
 			if (NULL != glXCreateContextAttribsARB)
 			{
-				BX_TRACE("Create GL 3.1 context.");
+				BX_TRACE("Create GL %d.%d context.", BGFX_CONFIG_RENDERER_OPENGL / 10, BGFX_CONFIG_RENDERER_OPENGL % 10);
 				int32_t flags = BGFX_CONFIG_DEBUG ? GLX_CONTEXT_DEBUG_BIT_ARB : 0;
 				const int contextAttrs[] =
 				{
-					GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
-					GLX_CONTEXT_MINOR_VERSION_ARB, 1,
+					GLX_CONTEXT_MAJOR_VERSION_ARB, BGFX_CONFIG_RENDERER_OPENGL / 10,
+					GLX_CONTEXT_MINOR_VERSION_ARB, BGFX_CONFIG_RENDERER_OPENGL % 10,
 					GLX_CONTEXT_FLAGS_ARB, flags,
 					GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_CORE_PROFILE_BIT_ARB,
 					0,