[FS#1219] ipt-debug module not compiling

[LEDE Bugs]

The following task has a new comment added:

FS#1219 - ipt-debug module not compiling
User who did this - Yousong Zhou (yousong)

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The fix was also backported to lede-17.01 branch:

 - fbeae9d891e7661cfb9f9d5209f9656234466127
 - 6ea9a702c5b6ff0866ae93241d6b2bdd80ead5e4
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1219#comment4183