base-linux: omit stack-area init for lx_hybrid

Fixes #2030

repos/base-linux/src/lib/base/attach_stack_area.cc

@@ -0,0 +1,29 @@
+/*
+ * \brief  Attach stack area to local address space
+ * \author Norman Feske
+ * \date   2016-07-06
+ *
+ * This function resides in a distinct compilation unit because it is not
+ * used for hybrid components where the Genode::Thread API is implemented
+ * via POSIX threads.
+ */
+
+/*
+ * Copyright (C) 2016 Genode Labs GmbH
+ *
+ * This file is part of the Genode OS framework, which is distributed
+ * under the terms of the GNU General Public License version 2.
+ */
+
+/* base-internal includes */
+#include <base/internal/platform_env.h>
+
+using namespace Genode;
+
+
+void Platform_env::_attach_stack_area()
+{
+	_local_pd_session._address_space.attach_at(_local_pd_session._stack_area.dataspace(),
+	                                           stack_area_virtual_base(),
+	                                           stack_area_virtual_size());
+}