bpcdump: capture all log output

bpcdump: capture all log output

When bpcdump starts, use a temporary file in /tmp to capture log output
from the info() and error() functions.  Then, which the correct home for
the info file is created, move the temporary file to that name and
continue along.

Prior to this commit, all of the output from info() and error() prior to
INFO being redefined were not also captured into the info file.