auto merge of #10366 : brson/rust/ignore-patterns, r=alexcrichton

This replaces `*` with `..` in enums, `_` with `..` in structs, and `.._` with `..` in vectors. It adds obsolete syntax warnings for the old forms but doesn't turn them on yet because we need a snapshot.

#5830

diff --cc src/librustc/middle/trans/debuginfo.rs
Simple merge