[FS#828] Automake compile failure when building toolchain from sources

[LEDE Bugs]

The following task is now closed:

FS#828 - Automake compile failure when building toolchain from sources
User who did this - Matthias Schiffer (NeoRaider)

Reason for closing: Fixed
Additional comments about closing: Fixed and backported to 17.01.

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=828