tree 172f346d59f60306491752ed6a42c0a08ba286ec
parent 4ad716c1407b626754888cee8a1c63a67edd6526
author Willy Tu <wltu@google.com> 1612916967 -0800
committer Patrick Williams <patrick@stwcx.xyz> 1624476025 +0000

meta-phosphor: os-release: Set weak default to DISTRO_VERSION

Improved practice to use DISTRO_VERSION instead of the undocumented
VERSION_ID.

DISTRO_VERSION is documented in yocto
https://www.yoctoproject.org/docs/latest/ref-manual/ref-manual.html
and specified in this section about creating your own distribution.
https://docs.yoctoproject.org/dev-manual/common-tasks.html#creating-your-own-distribution

VERSION_ID is undocumented and will more likely be changed compared
to the documented DISTRO_VERSION.

The VERSION_ID is set to DISTRO_VERSION in poky/.../os-release.bb

Use weak default to DISTRO_VERSION instead of overriding VERSION_ID.
This allows other layers to override in *.bbappend or *.conf.

Tested:
```
root@romulus:~# cat /etc/os-release
ID=openbmc-openpower
NAME="Phosphor OpenBMC (Phosphor OpenBMC Project Reference Distro)"
VERSION="2.11.0-dev"
VERSION_ID=2.11.0-dev-165-g20885c497
PRETTY_NAME="Phosphor OpenBMC (Phosphor OpenBMC Project Reference Distro) 2.11.0-dev"
BUILD_ID="2.11.0-dev"
OPENBMC_TARGET_MACHINE="romulus"
```

Signed-off-by: Willy Tu <wltu@google.com>
Change-Id: I25b5a165b764e6562fa8008c9d2a75a82fb09139