fix Issue 724: DESTDIR not supported with make install-langs

git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@730 d0cd1f9f-072b-0410-8dd7-cf729c803f20

tessdata/Makefile.am

@@ -47,7 +47,7 @@ install-langs:
 	@if test "${LANGS}" != ""; then \
 		for lang_code in ${LANGS}; do \
 			echo "installing data for $$lang_code"; \
-			$(INSTALL) -m 644 $$lang_code.* $(datadir); \
+			$(INSTALL) -m 644 $$lang_code.* $(DESTDIR)$(datadir); \
 		done; \
 	else \
 		for l in ./*.traineddata; do \
@@ -58,10 +58,10 @@ install-langs:
 				break; \
 			fi; \
 			echo "installing data for $$lang_code"; \
-			$(INSTALL) -m 644 $$lang_code.* $(datadir); \
+			$(INSTALL) -m 644 $$lang_code.* $(DESTDIR)$(datadir); \
 		done; \
 	fi;
 
 uninstall-local:
 	cd $(datadir); \
-	rm --force $(langdata)
+	rm --force $(DESTDIR)$(langdata)