[bcm syncd]: Wait initializing led_proc for 60 seconds (#1863)

* Wait initializing led_proc for 60 seconds. bcm sdk need time to be ready accept a connection

Author: yxieca

platform/broadcom/docker-syncd-brcm/start.sh

@@ -33,5 +33,6 @@ wait_syncd() {
 # If this platform has an initialization file for the Broadcom LED microprocessor, load it
 if [ -r ${PLATFORM_DIR}/led_proc_init.soc ]; then
     wait_syncd
+    sleep 60 # wait until bcm sdk is ready to get a request
     /usr/bin/bcmcmd -t 60 "rcload ${PLATFORM_DIR}/led_proc_init.soc"
 fi