[FS#56] netgear wndr4300 and wndr3700v4 not being built by the buildbot

[LEDE Bugs]

The following task has a new comment added:

FS#56 - netgear wndr4300 and wndr3700v4 not being built by the buildbot
User who did this - Ted Hess (thess)

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I don't think this is the problem. The only devices not getting images are Legacy ar71xx_nand devices. Device MR18 is not affected.

It also looks like the kernel modules are being built OK. It is just the image generation.
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=56#comment129