decl.c (xref_tag_1): Change pairs of errors to error + inform.

decl.c (xref_tag_1): Change pairs of errors to error + inform.

/cp
2016-06-02  Paolo Carlini  <paolo.carlini@oracle.com>

	* decl.c (xref_tag_1): Change pairs of errors to error + inform.
	(start_enum): Likewise.
	* parser.c (cp_parser_class_head): Likewise.

/testsuite
2016-06-02  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/cpp0x/forw_enum10.C: Adjust for dg-message vs dg-error.
	* g++.dg/cpp0x/forw_enum6.C: Likewise.
	* g++.dg/cpp0x/forw_enum8.C: Likewise.
	* g++.dg/cpp0x/override2.C: Likewise.
	* g++.dg/parse/crash5.C: Likewise.
	* g++.dg/parse/error16.C: Likewise.
	* g++.dg/parse/error27.C: Likewise.
	* g++.dg/template/qualttp15.C: Likewise.
	* g++.dg/template/redecl4.C: Likewise.
	* g++.old-deja/g++.other/crash39.C: Likewise.
	* g++.old-deja/g++.other/struct1.C: Likewise.
	* g++.old-deja/g++.pt/m9a.C: Likewise.
	* g++.old-deja/g++.pt/memclass10.C: Likewise.

From-SVN: r237046