[OE-core] [PATCH] devtool-source.bbclass: Only create each patch branch once

[Olof Johansson]

On 18-10-11 10:34 +0100, Richard Purdie wrote:
> This breaks the oe-selftest devtool tests:
> 
> https://autobuilder.yoctoproject.org/typhoon/api/v2/logs/46751/raw
> 
> oe-selftest -r devtool
> 
> should reproduce.

Thanks! Was under the impression that the DEVTOOL_EXTRA_OVERRIDES
was initialized to "", but that's not the case. Should it be? A
simple fix could be to just add DEVTOOL_EXTRA_OVERRIDES ??= "" to
the top of the bbclass. Is that the most appropriate fix? Or should
I make sure to handle None values coming back from getVar?


-- 
olofjn