Add native Windows binary for bison.

bison/src/bison/2.4.1/bison-2.4.1-src/po/Makevars

Index: bison/src/bison/2.4.1/bison-2.4.1-src/po/Makevars
===================================================================
--- bison/src/bison/2.4.1/bison-2.4.1-src/po/Makevars	(revision 0)
+++ bison/src/bison/2.4.1/bison-2.4.1-src/po/Makevars	(revision 0)
@@ -0,0 +1,55 @@
+# -*- buffer-read-only: t -*- vi: set ro:
+# DO NOT EDIT! GENERATED AUTOMATICALLY!
+# Makefile variables for PO directory in any package using GNU gettext.
+
+# Usually the message domain is the same as the package name.
+DOMAIN = $(PACKAGE)
+
+# These two variables depend on the location of this directory.
+subdir = po
+top_builddir = ..
+
+# These options get passed to xgettext.
+XGETTEXT_OPTIONS = --keyword=_ --keyword=N_ \
+	  \
+ --flag=_:1:pass-c-format\
+ --flag=N_:1:pass-c-format\
+ --flag=error:3:c-format --flag=error_at_line:5:c-format\
+\
+ --from-code=UTF-8\
+ --flag=asprintf:2:c-format\
+ --flag=complain:1:c-format --flag=complain_at:2:c-format\
+ --flag=fatal:1:c-format --flag=fatal_at:2:c-format\
+ --flag=warn:1:c-format  --flag=warn_at:2:c-format\
+ --flag=unexpected_end:2:c-format\
+ $${end_of_xgettext_options+}
+
+# This is the copyright holder that gets inserted into the header of the
+# $(DOMAIN).pot file.  Set this to the copyright holder of the surrounding
+# package.  (Note that the msgstr strings, extracted from the package's
+# sources, belong to the copyright holder of the package.)  Translators are
+# expected to transfer the copyright for their translations to this person
+# or entity, or to disclaim their copyright.  The empty string stands for
+# the public domain; in this case the translators are expected to disclaim
+# their copyright.
+COPYRIGHT_HOLDER = Free Software Foundation, Inc.
+
+# This is the email address or URL to which the translators shall report
+# bugs in the untranslated strings:
+# - Strings which are not entire sentences, see the maintainer guidelines
+#   in the GNU gettext documentation, section 'Preparing Strings'.
+# - Strings which use unclear terms or require additional context to be
+#   understood.
+# - Strings which make invalid assumptions about notation of date, time or
+#   money.
+# - Pluralisation problems.
+# - Incorrect English spelling.
+# - Incorrect formatting.
+# It can be your email address, or a mailing list address where translators
+# can write to without being subscribed, or the URL of a web page through
+# which the translators can contact you.
+MSGID_BUGS_ADDRESS = bug-bison@gnu.org
+
+# This is the list of locale categories, beyond LC_MESSAGES, for which the
+# message catalogs shall be used.  It is usually empty.
+EXTRA_LOCALE_CATEGORIES =