[FS#1280] WNDR3700 v1 comes up in failsafe after attempted upgrade from LEDE 17.01.4 to Trunk (1/16/2018)

[LEDE Bugs]

The following task is now closed:

FS#1280 - WNDR3700 v1 comes up in failsafe after attempted upgrade from LEDE 17.01.4 to Trunk (1/16/2018)
User who did this - Mathias Kresin (mkresin)

Reason for closing: Works for me
Additional comments about closing: From reporter: After a rebuild of trunk flashing was successful this time. Will open a new bug if I find a more definitive failing config. 

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1280