devshell.bbclass: Import newer version from oe-core 1.5 dora

:Release Notes:
We need newer version to prevent pseudo directories to be created
in wrong allarch directories.

:Detailed Notes:
Only difference is this commit:
http://git.openembedded.org/openembedded-core/commit/?h=dora&id=
56baf177cdf074929a090cc66a8b89d346a5d79c

:Testing Performed:
Only build tested, WORKDIR checked.

:QA Notes:
No change in image.

:Issues Addressed:
[GF-8132] pseudo creates directories under all-webos-linux-gnueabi
          for recipes that inherit allarch.bbclass

Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <martin.jansa@lge.com>
Change-Id: I917d9c1af7edd230194f4cd4c2896175defcf57f
Reviewed-on: https://g2g.palm.com/3683
Reviewed-by: Build Verification
Reviewed-by: Martin Jansa <Martin.Jansa@lge.com>
Tested-by: Martin Jansa <Martin.Jansa@lge.com>
Reviewed-by: Susan Montooth <susan.montooth@lge.com>