Hack for API change to test.support.bigmemtest
Hack for API change to test.support.bigmemtest

This gets the two big memory tests to run under Python 3.1
but the big memory decompression test fails as below:

ERROR: test_decompressor_bigmem (__main__.CompressorDecompressorTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File test_lzma.py, line 19, in wrapper
    return f(self, 5147)
  File test_lzma.py, line 224, in test_decompressor_bigmem
    block = random.getrandbits(blocksize * 8).to_bytes(blocksize, little)
AttributeError: 'int' object has no attribute 'to_bytes'

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