Bugfix for macros that call macros and for `trace_macro!`#4045

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paulstansifer wants to merge 2 commits intorust-lang:incomingfrom

paulstansifer:fix_macro_parser_sync

Commits on Nov 27, 2012

Fix trace_macros so that it works.
paulstansifer
committed
Properly sync macro_parser.rs after it escapes out to the Rust parser. Closes #3201.
paulstansifer
committed