[OE-core] Backport request: "icecc: Add dummy python version of set_icecc_env"

[Daniel Elstner]

Hi,

I'm using dora and have recently adopted Icecream to speed up my build
times.  Unfortunately, icecc.bbclass breaks with the pslash recipe in a
way that is not easily worked around.

The problem has already been fixed in master, though:

icecc: Add dummy python version of set_icecc_env

        Bitbakes prepend mechanism for the tasks disregards the type of
        the function. Thus bitbaking recipes using python functions for
        configure, compile or install steps fail due to the missing
        python version of set_icecc_env. Assuming that icecc doesn't
        need to be used in such situations adding a dummy python version
        of set_icecc_env fixes this.
        
        Signed-off-by: Tobias Henkel <tobias.henkel at bmw-carit.de>
        Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>

Simply cherry-picking this commit made things work for me.  It would be
great if it could be backported to dora.

Cheers and thanks,
-- 
Daniel Elstner | daniel.elstner at kdab.com | Software Engineer
KDAB (Deutschland) GmbH & Co KG, a KDAB Group company
Tel. Germany +49-30-521325470, Sweden (HQ) +46-563-540090
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