Fixes id.h error during updating ripper.c by `make after-update`.
While it used to update id.h in the build directory, but was trying to
update ripper.c in the source directory. In principle, files in the
source directory can or should not depend on files in the build
directory.
* tool/generic_erb.rb, tool/id2token.rb: add --path-separator option
for mingw where make and built ruby live in different world.
* tool/vpath.rb: extract from tool/instruction.rb.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37985 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* template/id.h.tmpl, tool/id2token.rb: make id.h independent from
parse.h, and make parse.c dependent on it instead.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36864 b2dd03c8-39d4-4d8f-98ff-823fe69b080e