re PR c++/18514 (Alternate "asm" name ignored for redeclared builtin function imported into namespace std)

 	PR c++/18514
 	* name-lookup.c (do_nonmember_using_decl): A real function
 	declaration takes precedence over an anticipated declaration.
 	* g++.dg/ext/builtin1.C: New
 	* g++.dg/ext/builtin2.C: New
 	* g++.dg/ext/builtin3.C: New
 	* g++.dg/ext/builtin4.C: New
 	* g++.dg/ext/builtin5.C: New

From-SVN: r91972