[FS#165] kernel panic on x86_64-newest trunk build

[LEDE Bugs]

The following task has a new comment added:

FS#165 - kernel panic on x86_64-newest trunk build
User who did this - debiansid (debiansid)

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switch back to gcc5.4.0 and binutils 2.25.1 fixed it.
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=165#comment414