decl.c (grokdeclarator): Use rich_location::add_range in three more places; include gcc-rich-location.h.

/cp
2018-07-09  Paolo Carlini  <paolo.carlini@oracle.com>

	* decl.c (grokdeclarator): Use rich_location::add_range in three
	more places; include gcc-rich-location.h.

/testsuite
2018-07-09  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/diagnostic/long-short.C: New.
	* g++.dg/diagnostic/signed-unsigned.C: Likewise.
	* g++.dg/diagnostic/virtual-friend.C: Likewise.
	* g++.old-deja/g++.brendan/crash11.C: Adjust.

From-SVN: r262512