logrotate: Bump version to 3.8.4

The changelog for logrotate indicates some CVE's were fixed in 3.8.0.
(changelog at http://svn.fedorahosted.org/svn/logrotate/tags/r3-8-4/CHANGES)

Signed-off-by: Arne Rovet <arnerro@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/logrotate/logrotate.mk

@@ -3,7 +3,7 @@
 # logrotate
 #
 #############################################################
-LOGROTATE_VERSION = 3.7.9
+LOGROTATE_VERSION = 3.8.4
 LOGROTATE_SOURCE = logrotate-$(LOGROTATE_VERSION).tar.gz
 LOGROTATE_SITE = https://fedorahosted.org/releases/l/o/logrotate/
 LOGROTATE_LICENSE = GPLv2+