make test on logstats can fail due to math rounding difference

When doing "make test" for logstats, it can differ slightly on some of the floating point calculations. E.g.

159c159
< Cache miss total             88        1,059          423.758          199.432
---
> Cache miss total             88        1,059          423.758          199.431

One suggestion would be to allow for a few lines of differences, another is to round the produced text file (munge them) such that the likelihood of rounding discrepancies is small.