Log Message:
Update re2c to 0.13.6.

Version 0.13.6 (2013-07-04)
---------------------------
- Fixed #2535084 uint problem with Sun C 5.8
- #3308400: allow Yacc-style %{code brackets}%
- #2506253: allow C++ // comments
- Fixed inplace configuration in -e mode.
- Applied #2482572 Typos in error messages.
- Applied #2482561 Error in manual section on -r mode.
- Fixed #2478216 Wrong start_label in -c mode.
- Fixed #2186718 Unescaped backslash in file name of #line directive.
- Fixed #2102138 Duplicate case labels on EBCDIC.
- Fixed #2088583 Compile problem on AIX.
- Fixed #2038610 Ebcdic problem.
- improve dot support: make char intervals (e.g. [A-Z]) instead of one edge per char