zeromq: bump to version 4.0.4

Signed-off-by: Jerzy Grzegorek <jerzy.grzegorek@trzebnica.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/zeromq/zeromq.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-ZEROMQ_VERSION = 4.0.1
+ZEROMQ_VERSION = 4.0.4
 ZEROMQ_SITE = http://download.zeromq.org/
 ZEROMQ_INSTALL_STAGING = YES
 ZEROMQ_DEPENDENCIES = util-linux