literals: disable tuned boyer moore
literals: disable tuned boyer moore

There is a bug in the implementation and it's not clear how to fix it. A
unit test has been added (marked to fail) that exposes the bug.

For more discussion, see: https://github.com/rust-lang/regex/issues/446

rust-lang-nursery/regex,rust-lang/regex,rust-lang/regex,rust-lang-nursery/regex,rust-lang/regex,rust-lang-nursery/regex,rust-lang/regex,rust-lang-nursery/regex,rust-lang-nursery/regex,rust-lang/regex