gcc/
	Implement DR2061
	* name-lookup.c (push_inline_namespaces): New.
	(push_namespace): Look inside inline namespaces.

	testsuite/
	* g++.dg/cpp0x/dr2061.C: New.
	* g++.dg/parse/namespace-alias-1.C: Add more test.

From-SVN: r248521