ubox: implement service_running() in log init.d script

It allows checking if service is running.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit 1b937cb141)

package/system/ubox/Makefile

@@ -1,7 +1,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ubox
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(PROJECT_GIT)/project/ubox.git

package/system/ubox/files/log.init

@@ -96,3 +96,7 @@ start_service()
 	config_foreach validate_log_section system start_service_file
 	config_foreach validate_log_section system start_service_remote
 }
+
+service_running() {
+	procd_running log
+}