[source] hostapd: fix iapp_interface option

[LEDE Commits]

mkresin pushed a commit to source.git, branch lede-17.01:
https://git.lede-project.org/082e6215b7cc5c823d6b0254de45420209ad68b1

commit 082e6215b7cc5c823d6b0254de45420209ad68b1
Author: Lorenzo Santina <lorenzo.santina.dev at gmail.com>
AuthorDate: Sat Sep 9 16:40:57 2017 +0200

    hostapd: fix iapp_interface option
    
    ifname variable were not assigned due to syntax error
    causing the hostapd config file to have an empty iapp_interface= option
    
    Signed-off-by: Lorenzo Santina <lorenzo.santina.dev at gmail.com>
---
 package/network/services/hostapd/files/hostapd.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package/network/services/hostapd/files/hostapd.sh b/package/network/services/hostapd/files/hostapd.sh
index 32c09c6..57d74d8 100644
--- a/package/network/services/hostapd/files/hostapd.sh
+++ b/package/network/services/hostapd/files/hostapd.sh
@@ -364,7 +364,7 @@ hostapd_set_bss_options() {
 	[ -n "$network_bridge" ] && append bss_conf "bridge=$network_bridge" "$N"
 	[ -n "$iapp_interface" ] && {
 		local ifname
-		network_get_device ifname "$iapp_interface" || ifname = "$iapp_interface"
+		network_get_device ifname "$iapp_interface" || ifname="$iapp_interface"
 		append bss_conf "iapp_interface=$ifname" "$N"
 	}