openwrt: fix hostapd to work with make 4.3

Debian Sid updated make to 4.3. This patch is needed to build gluon on
such recent systems.

Signed-off-by: Chrissi^ <chris@tinyhost.de>

patches/openwrt/0026-hostapd-remove-erroneous-space-redefinition.patch

+From 31ebaa56ed66eceb2d52b909f7d8cd406df2aa9b Mon Sep 17 00:00:00 2001
+From: Jo-Philipp Wich <jo@mein.io>
+Date: Sat, 8 Feb 2020 11:34:41 +0100
+Subject: [PATCH] hostapd: remove erroneous $(space) redefinition
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+The $(space) definition in the hostapd Makefile ceased to work with
+GNU Make 4.3 and later, leading to syntax errors in the generated
+Kconfig files.
+
+Drop the superfluous redefinition and reuse the working $(space)
+declaration from rules.mk to fix this issue.
+
+Fixes: GH#2713
+Ref: https://github.com/openwrt/openwrt/pull/2713#issuecomment-583722469
+Reported-by: Karel Kočí <cynerd@email.cz>
+Suggested-by: Jonas Gorski <jonas.gorski@gmail.com>
+Tested-by: Shaleen Jain <shaleen@jain.sh>
+Signed-off-by: Jo-Philipp Wich <jo@mein.io>
+---
+ package/network/services/hostapd/Makefile | 5 +----
+ 1 file changed, 1 insertion(+), 4 deletions(-)
+
+diff --git a/package/network/services/hostapd/Makefile b/package/network/services/hostapd/Makefile
+index b548ecdf1b..2e4cfbd9f0 100644
+--- a/package/network/services/hostapd/Makefile
++++ b/package/network/services/hostapd/Makefile
+@@ -88,10 +88,7 @@ DRIVER_MAKEOPTS= \
+ 	CONFIG_IEEE80211AC=$(HOSTAPD_IEEE80211AC) \
+ 	CONFIG_DRIVER_WEXT=$(CONFIG_DRIVER_WEXT_SUPPORT) \
+ 
+-space :=
+-space +=
+-
+-ifeq ($(LOCAL_VARIANT),full)
++ifneq ($(LOCAL_VARIANT),mini)
+   DRIVER_MAKEOPTS += CONFIG_IEEE80211W=$(CONFIG_DRIVER_11W_SUPPORT)
+ endif
+ 
+-- 
+2.27.0
+