fix(toolbox): fix some compilation bug in build-dc

Fix a ld compilation bug for build-dc: the -lgomp option was not
placed at the end of the command and so was ignored on some version
of gcc.
Now it is placed right before the '-lm' option, so it should work for
every version of gcc.
Also make the compilation quiet, especially for gcc version dependent
warnings.
fix(toolbox): fix the default destination directory

Set the default destination directory to match the one in build-dc.
Also remove some big files generated by the benchmark run.
feat(toolbox): add some new native benchmarks

Add native (and interleaved in native) benchmarks for swaptions and
dc.
Also fixed a bug which can occurs if oprofile is too long to collect
its data: now wait until there is no more oprofile process, instead of
waiting 1 second (arbitrarily).
fix(toolbox): fix a grep issue in xen-shutdown

Before the fix, when xen-shutdown was waiting the domu(s) is really
done, it could grep some erroneous information (if the domu's name was
containing some digit, their were token as the ID) and terminate too
quickly.
feat(toolbox): add a size parameter for domu configuration in xenbench

Xenbench is now able to understand the "size" parameter in a domu
element of a configuration file and set the size of its home
accordingly.
feat(toolbox): add a script to append data fils column by column

Add a script which perform the cat equivalent but in column, usefull
to merge data files.
feat(toolbox): add a column reduction script

Add a script to perform a reduction with various operations on a
file gnuplot formatted.
feat(toolbox): add a line reduction script

Add a script to perform a reduction with various operations on a file
gnuplot formatted.
feat(toolbox): add a column mapping script

Add a script to perform a mapping with various operations on a file
gnuplot formatted.
fix(toolbox): fix a data extraction problem in oproperf

Oproperf was parsing the xml badly and so, was giving erroneous
results. Now it parse plain text and for more safety, keep the raw
data in a .tgz file in case of bad extraction.
feat(toolbox): add a column filtering script

Add a script to perform a filtering script on a file gnuplot
formatted.
perf:  add a bunch of benchmark results
Merge branch 'benchmark-toolbox' of https://github.com/gauthier-voron/bigos into benchmark-toolbox