PR c++/79301
* parser.c (cp_parser_std_attribute): Don't pedwarn about
[[deprecated]] with -std=c++11 and [[fallthrough]] with
-std=c++11 and -std=c++14.
* g++.dg/cpp1y/feat-cxx11-neg.C: Remove (with pedwarn) from
[[deprecated]] comment.
* g++.dg/cpp1y/feat-cxx98-neg.C: Likewise.
* g++.dg/cpp1y/feat-cxx11.C: Likewise.
* g++.dg/cpp1y/attr-deprecated-neg.C: Don't expect warnings for
[[deprecated]] in -std=c++11.
* g++.dg/cpp0x/fallthrough2.C: Don't expect warnings for
[[fallthrough]] in -std=c++11 and -std=c++14.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@245489 138bc75d-0d04-0410-961f-82ee72b054a4