Script.make: copy etc dir only if it's not empty

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@57109 15284696-431f-4ddb-bdfa-cd5b030d7da7

include/Make/Script.make

@@ -27,7 +27,7 @@ install:
 	$(INSTALL) $(SCRIPT) $(INST_DIR)/scripts/
 	$(INSTALL_DATA) $(HTMLDIR)/$(PGM).html $(INST_DIR)/docs/html/
 	$(INSTALL_DATA) $(ARCH_DISTDIR)/docs/man/man1/$(PGM).1 $(INST_DIR)/docs/man/man1/
-	if [ -d "$(ETC)/$(PGM)" ] ; then \
+	if [ -d "$(ETC)/$(PGM)" -a "$(ls -A $(ETC)/$(PGM))" ] ; then \
 		cp -rL $(ETC)/$(PGM) $(INST_DIR)/etc/ ; \
 	fi