Fix deleted node handling in libprofile

Fix deleted node handling in libprofile

In profile_find_node, skip deleted nodes when finding the second
match.  Otherwise, profile_clear_nodes could return an error if a node
has some values to clear but the last one is deleted.

In profile_node_iterator, skip deleted nodes when looking up the
section names.  Otherwise we could iterate over a deleted section
and/or ignore its replacement.

(cherry picked from commit e7f50a1c11845ba73ce4ffa4729d10113563a247)

ticket: 8117 (new)
version_fixed: 1.11.6
status: resolved