Fix some easy things in test_lzma.py for Python 2
Fix some easy things in test_lzma.py for Python 2

Would to fix SyntaxError from b"text" for Python 2.5,
but that can fail until the main code works...

r3m0t/backports.lzma,peterjc/backports.lzma,peterjc/backports.lzma