For p1022ds bsp, the MULTIARCH is powerpc-linux-gnuspev1 and
python3 did not recognize the extra 'v1' which caused python3
configure error for the platform triplet.
Q:Why Python3 check platform triplet?
A:Under Linux, GNU/KFreeBSD and the Hurd, C extensions now include
the architecture triplet in the extension name, to make it easy to
test builds for different ABIs in the same working tree.
vim config.log
...
EXT_SUFFIX='.cpython-35m-powerpc-linux-gnuspe.so'
...
Here is the generated C extensions which take platform triplet into account.
...
|image/usr/lib/python3.5/lib-dynload/_datetime.cpython-35m-powerpc-linux-gnuspe.so
...
