libnl: enable parallel make

Current versions of libnl (since 3.2.4, at least) do not appear to
require MAKE1.

Signed-off-by: Nathan Lynch <ntl@pobox.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Tested-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/libnl/libnl.mk

@@ -10,7 +10,6 @@ LIBNL_LICENSE = LGPLv2.1+
 LIBNL_LICENSE_FILES = COPYING
 LIBNL_INSTALL_STAGING = YES
 LIBNL_DEPENDENCIES = host-bison host-flex
-LIBNL_MAKE = $(MAKE1)
 LIBNL_BINARIES = class-add class-delete class-list classid-lookup cls-add \
 	cls-delete cls-list link-list pktloc-lookup qdisc-add qdisc-delete \
 	qdisc-list