net/mosquitto: bump to 1.5.4

Security and bugfix release.  Full release notes available at:
https://mosquitto.org/blog/2018/11/version-154-released/

Security:
* client certificates not validated for websockets listeners.

Bugfixes:
* wills with disconnected clients better handled
* bridge restart_timeout properly observed

Signed-off-by: Karl Palsson <karlp@etactica.com>

net/mosquitto/Makefile

@@ -9,15 +9,15 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=mosquitto
-PKG_VERSION:=1.5.3
-PKG_RELEASE:=3
+PKG_VERSION:=1.5.4
+PKG_RELEASE:=1
 PKG_LICENSE:=BSD-3-Clause
 PKG_LICENSE_FILES:=LICENSE.txt
 PKG_CPE_ID:=cpe:/a:eclipse:mosquitto
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://mosquitto.org/files/source/
-PKG_HASH:=3081a998d303a883b1cd064009beabc88aa9159e26f5258a4ae6007160491d10
+PKG_HASH:=5fd7f3454fd6d286645d032bc07f44a1c8583cec02ef2422c9eb32e0a89a9b2f
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(BUILD_VARIANT)/$(PKG_NAME)-$(PKG_VERSION)
 
 include $(INCLUDE_DIR)/package.mk