[FS#969] xtables-addons fails to compile

[LEDE Bugs]

The following task has a new comment added:

FS#969 - xtables-addons fails to compile
User who did this - Philip Prindeville (pprindeville)

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Problem goes away if I `git reset --hard d9564d7` and drop the following commits:

2d02a4f kernel: update 4.9 to 4.9.44
364befe kernel: update 4.4 to 4.4.83
1f06858 mediatek: update to latest kernel patchset from v4.13-rc
a307480 procd: fix hotplug-preinit.json syntax
5209cfa procd: fix hotplug.json syntax
a2a226e ca-certificates: Update to 20170717
bfada08 imx6: refresh kernel config
0997185 imx6: add driver for temp/voltage monitoring
3e6d303 uboot-lantiq: Enable TFTP PUT support for backups

I suspect it's the 4.9.40 to 4.9.44 update which breaks things, as none of the rest seem to come into play at all.
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=969#comment3266