[FS#484] Image Builder generates broken image for ASUS WL500W

[LEDE Bugs]

The following task has a new comment added:

FS#484 - Image Builder generates broken image for ASUS WL500W
User who did this - Mirko Parthey (mpa)

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The mtd fixtrx subcommand was previously missing in this package:
https://downloads.lede-project.org/releases/packages-17.01/mipsel_mips32/base/mtd_21_mipsel_mips32.ipk
which is used by the Image Builder.

However, the mtd binary built into the official firmware image was working OK, which explains the difference in behaviour.

Apparently the broken mtd package has now been replaced with a fixed version,
and this bug report can be closed.

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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=484#comment1986