lshal: pretty print table.

Table column length is not hardcoded, but computed
from length of each cell.

Without --neat, table column length varies for each
table.

As an effect, --neat does not emit debug info. Update
warning messages to reflect this.

Test: lshal
Test: lshal_test
Test: lshal --neat

Bug: 35389839

Change-Id: Id1d626a10ba58e20d2799854432dba74cfeaae6f