[OE-core] [Patch 0/1 V3] Update relocate_sdk.py to work with Python 2.4

[Konrad Scherer]

As a bootstrap script, relocate_sdk.py needs to support as many
versions of python as possible. Since python 2.4.3 is default python
on RedHat/CentOS 5.x, the recent updates to support python 3 broke
these platforms. This is the cleanest way I could find to support all
pythons 2.4 to 3. I have tested the patch on 2.4.3, 2.6.5, 2.7.3 and
3.2.3.

V2: Detect the system encoding before converting

V3: Remove unneeded import codecs

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Konrad Scherer, MTS, Linux Products Group, Wind River