keepalived: disable libnl

When libnl is enabled and libnl-genl is disabled, libnl-genl-3.so.200 is
installed by InstallDev, and keepalived picks it up anyway.
This causes build to fail with the following error:

Package keepalived is missing dependencies for the following libraries:
libnl-genl-3.so.200

Instead of having a conditional dependency it is better to have a
consistent build. Disable libnl to enforce this.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

net/keepalived/Makefile

@@ -31,7 +31,6 @@ define Package/keepalived
   TITLE:=Failover and monitoring daemon for LVS clusters
   URL:=http://www.keepalived.org/
   DEPENDS:= \
-    +PACKAGE_libnl-genl:libnl-genl \
     +libopenssl \
     +libip4tc \
     +IPV6:libip6tc \
@@ -54,6 +53,7 @@ define Package/keepalived/conffiles
 endef
 
 CONFIGURE_ARGS+= \
+	--disable-libnl \
 	--enable-sha1 \
 	--disable-snmp \
 	--with-kernel-dir="$(LINUX_DIR)/$(LINUX_UAPI_DIR)"