headless: Enable softgpu jit for tests.

headless/Headless.cpp

@@ -395,6 +395,7 @@ int main(int argc, const char* argv[])
 	g_Config.bEnableLogging = fullLog;
 	g_Config.bSoftwareSkinning = true;
 	g_Config.bVertexDecoderJit = true;
+	g_Config.bSoftwareRenderingJit = true;
 	g_Config.bBlockTransferGPU = true;
 	g_Config.iSplineBezierQuality = 2;
 	g_Config.bHighQualityDepth = true;