Remove noexcept from filesystem iterators and operations (LWG 3013, 3014)
* include/bits/fs_dir.h (directory_iterator): Remove noexcept from
constructors and increment member (LWG 3013).
(recursive_directory_iterator): Likewise.
* include/bits/fs_ops.h (copy, copy_file, create_directories)
(is_empty, remove_all): Remove noexcept (LWG 3013 and LWG 3014).
* src/filesystem/std-dir.cc (directory_iterator::increment)
(recursive_directory_iterator::increment): Remove noexcept.
* src/filesystem/std-ops.cc (copy, copy_file, create_directories)
(is_empty, remove_all): Remove noexcept
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@254160 138bc75d-0d04-0410-961f-82ee72b054a4