DR 1511 - const volatile variables and ODR
	* decl.c (grokvardecl): Change flags argument to type_quals,
	add conceptp argument.  Set TREE_PUBLIC for non-static volatile vars.
	(grokdeclarator): Adjust grokvardecl caller.

	* g++.dg/DRs/dr1511-1.C: New test.
	* g++.dg/DRs/dr1511-2.C: New test.

From-SVN: r241176