Log Message:
Update to 2.5.39:

* flex version  2.5.39

** no user visible changes in this release

* version 2.5.38 released 2014-02-14

** internationalization

*** add sr translation from the translation project

*** update da, es, ko, nl, pt_BR, ro, ru, sv, tr, vi, zh_CN translations from \ 
the translation project

*** rename zh_tw to its proper zh_TW name

* version 2.5.37 released 2012-08-03

** Import flex into git. See
   git://flex.git.sourceforge.net/gitroot/flex/flex.

** Fix make install target to not fail when the flex++ program is
   already installed

** New translations from the translation project: de, fi, pl, vi