Clean up base-library structure

This patch moves the base library from src/base to src/lib/base,
flattens the library-internal directory structure, and moves the common
parts of the library-description files to base/lib/mk/base.inc and
base/lib/mk/base-common.inc.

Furthermore, the patch fixes a few cosmetic issues (whitespace and
comments only) that I encountered while browsing the result.

Fixes #1952

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

@@ -0,0 +1,69 @@
+/*
+ * \brief  Pseudo region map client stub targeting the process-local implementation
+ * \author Norman Feske
+ * \date   2011-11-21
+ */
+
+/*
+ * Copyright (C) 2011-2016 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.
+ */
+
+/* Genode includes */
+#include <region_map/client.h>
+
+/* base-internal includes */
+#include <base/internal/local_capability.h>
+
+using namespace Genode;
+
+
+/**
+ * Return pointer to locally implemented region map
+ *
+ * \throw Local_interface::Non_local_capability
+ */
+static Region_map *_local(Capability<Region_map> cap)
+{
+	return Local_capability<Region_map>::deref(cap);
+}
+
+
+Region_map_client::Region_map_client(Capability<Region_map> session)
+: Rpc_client<Region_map>(session) { }
+
+
+Region_map::Local_addr
+Region_map_client::attach(Dataspace_capability ds, size_t size,
+                          off_t offset, bool use_local_addr,
+                          Region_map::Local_addr local_addr,
+                          bool executable)
+{
+	return _local(*this)->attach(ds, size, offset, use_local_addr,
+	                             local_addr, executable);
+}
+
+
+void Region_map_client::detach(Local_addr local_addr) {
+	return _local(*this)->detach(local_addr); }
+
+
+void Region_map_client::fault_handler(Signal_context_capability /*handler*/)
+{
+	/*
+	 * On Linux, page faults are never reflected to the user land. They
+	 * are always handled by the kernel. If a segmentation fault
+	 * occurs, this condition is being reflected as a CPU exception
+	 * to the handler registered via 'Cpu_session::exception_handler'.
+	 */
+}
+
+
+Region_map::State Region_map_client::state() { return _local(*this)->state(); }
+
+
+Dataspace_capability Region_map_client::dataspace() {
+	return _local(*this)->dataspace(); }
+