These are the image files for the logs/brcm47xx target.
Check that the md5sum of the file you downloaded matches the md5sum below.
Shortened image file names below have the same prefix:
|Image for your Device||md5sum||File Size||Date|
|generic/||-||-||Sun Dec 10 21:24:03 2017|
|legacy/||-||-||Sun Dec 10 21:24:03 2017|
|mips74k/||-||-||Sun Dec 10 21:24:03 2017|
These are supplementary resources for the logs/brcm47xx target. They include build tools, the imagebuilder, md5sum, GPG signature file, and other useful files.