Cbench - Scalable Cluster Benchmarking Code

Ignore failed makes so that all possible openapps are compiled (instead of stopping when phdmesh fails, for example).

Throttle the output of '+' during tests and cause the summary to be on its own line (for readability).

check for the error case where a job output file,
i.e. *.o*, is empty or truncated or just garbled. in
this case the Cbench embedded info is not there and
this can cause odd spurious errors which don't need
to be seen

Fix a bug with executing 'make clean'.

Removing log files that were included in the LAMMPS distribution since it's highly unlikely that we'll ever use them.

prevent spurious errors in start_jobs() in the case
where a test ident doesn't exist

update to clean target

Reduce problem size so that 8ppn jobs use ~1.4GB of memory per process

Minor tweak to avoid duplicate CFLAGS

minor clean tweak