patch provided by A. Pogrebennyk - no build errors when using CI system

was:  082f06f5 ... and not installing default config files

Note: proper targets should be used (e.g. install-bin) if only
      binaries should be installed, or alternatively the pkg script should
      remove installed cfg files afterwards. install target
      installs the complete package

apps/Makefile

@@ -58,11 +58,11 @@ clean:
 
 .PHONY: modules
 modules:
-	-@for r in $(app_modules) "" ; do \
-		if [ -n "$$r" ]; then \
+	@for r in $(app_modules) "" ; do \
+		if [ -n "$$r" -a -f "$$r"/Makefile ]; then \
 			echo  "" ; \
 			echo  "" ; \
-			COREPATH=../$(COREPATH) $(MAKE) -C $$r all; \
+			COREPATH=../$(COREPATH) $(MAKE) -C $$r all || exit 1; \
 		fi ; \
 	done 
 

core/plug-in/Makefile.app_module

@@ -27,12 +27,12 @@ depends  = $(srcs:.cpp=.d)
 
 .PHONY: all
 all: $(extra_target)
-	-@$(MAKE) deps    && \
+	@$(MAKE) deps    && \
 	  $(MAKE) $(lib_full_name)
 
 .PHONY: module_package
 module_package: $(extra_target)
-	-@$(MAKE) deps    && \
+	@$(MAKE) deps    && \
 	  $(MAKE) $(lib_name)