Use 'ja_JP.eucJP' name for referencing japanese directory while

declaring DESTDIR.  It should not hurt anything, but unbreaks new
'make package' which is using 'realpath' and therefore gets lost
in middle of process.

Noticed by:	simon

ja_JP.eucJP/articles/Makefile.inc

@@ -3,4 +3,4 @@
 #
 # Original revision: 1.4
 
-DESTDIR?=	${DOCDIR}/ja/articles/${.CURDIR:T}
+DESTDIR?=	${DOCDIR}/ja_JP.eucJP/articles/${.CURDIR:T}

ja_JP.eucJP/books/Makefile.inc

@@ -2,4 +2,4 @@
 # $FreeBSD$
 #
 
-DESTDIR?=	${DOCDIR}/ja/books/${.CURDIR:T}
+DESTDIR?=	${DOCDIR}/ja_JP.eucJP/books/${.CURDIR:T}