This commit causes buildinfohelper to crash when run on python 3
as python 3 doesn't have unicode builtin function.
This reverts commit 7a309d964a.
(Bitbake rev: 750ca5c8d5a25fc519b75c56352dec7823c7e240)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>