common.mk: show locale

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59000 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

common.mk

@@ -203,6 +203,9 @@ showflags:
 	"	CPPFLAGS = $(CPPFLAGS)" \
 	"	DLDFLAGS = $(DLDFLAGS)" \
 	"	SOLIBS = $(SOLIBS)" \
+	"	LANG = $(LANG)" \
+	"	LC_ALL = $(LC_ALL)" \
+	"	LC_CTYPE = $(LC_CTYPE)" \
 	$(MESSAGE_END)
 	-@$(CC_VERSION)