[FS#1123] base-files: os-release: HOME_URL not settable / set to LEDE_DEVICE_MANUFACTURER_URL

[LEDE Bugs]

The following task has a new comment added:

FS#1123 - base-files: os-release: HOME_URL not settable / set to LEDE_DEVICE_MANUFACTURER_URL
User who did this - Yousong Zhou (yousong)

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LEDE_DEVICE_xxx vars should be device-specific instead of being a global option.  I guess the option was previously introduced for oem users.  As such setting HOME_URL also to LEDE_DEVICE_MANUFACTURER_URL with a default value of upstream homepage makes sense.

I cannot reproduce the 3rd issue about LEDE_DEVICE_MANUFACTURER_URL and HOME_URL not being in sync.  It works as expected here.
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1123#comment4219