[MDC-433] simetbox-openwrt-simet-lmapd: fix v0.13.0 build on OpenWRT CC

[MDC-433] simetbox-openwrt-simet-lmapd: fix v0.13.0 build on OpenWRT CC

Somehow, the patch to get simet-lmapd to build under ancient CMake
(required by OpenWRT CC) got corrupted.  Fix it.

Fixes: e96e6f317b7108b57903ba915d544a4c5714f956
       ([MDC-433] simetbox-openwrt-simet-{ma,lmapd}: update for v0.13.0)