package/collectd: fix SELinux

Add apache module as for now it is unconditionally used in collectd.fc
to fix build failure raised since
4f20ad546fd89e8e2dee7b40ebea9878e72d082f

Fixes:
 - http://autobuild.buildroot.org/results/94d8adab9fd0083e24d5112ae7daa56e7944793b

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/collectd/collectd.mk

@@ -13,7 +13,7 @@ COLLECTD_INSTALL_STAGING = YES
 COLLECTD_LICENSE = MIT (daemon, plugins), GPL-2.0 (plugins), LGPL-2.1 (plugins)
 COLLECTD_LICENSE_FILES = COPYING
 COLLECTD_CPE_ID_VENDOR = collectd
-COLLECTD_SELINUX_MODULES = collectd
+COLLECTD_SELINUX_MODULES = apache collectd
 
 # These require unmet dependencies, are fringe, pointless or deprecated
 COLLECTD_PLUGINS_DISABLE = \