* lex.c.src: copied from keywords. This is the source of lex.c.blt.
* Makefile.in (lex.c): use lex.c.blt if keywords is same as lex.c.src.
* win32/Makefile.sub (lex.c): re-introduce copy rule.
* bcc32/Makefile.sub (lex.c): ditto.
* wince/Makefile.sub (lex.c): ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13906 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
akr