[PATCH 9 of 9 STABLE?] doc: make i18n man and html

[Takumi IINO]

# HG changeset patch
# User Takumi IINO <trot.thunder at gmail.com>
# Date 1368515737 -32400
#      Tue May 14 16:15:37 2013 +0900
# Branch stable
# Node ID de794218d5f98b4f4b1a9d12fdfce9039d64e1ba
# Parent  1c0b5e0eba2d7be1bd30dac1813be09d51e041d7
doc: make i18n man and html

Stop overwrite LANGUAGE and LC_ALL, for make i18n man and html.
After this patch, we can make i18n man and html by following command:

  $ LANGUAGE=ja make clean all

diff --git a/doc/Makefile b/doc/Makefile
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -9,8 +9,8 @@
 PYTHON=python
 RSTARGS=
 
-export LANGUAGE=C
-export LC_ALL=C
+export LANGUAGE
+export LC_ALL
 
 all: man html