Add support for vallgrind 3.16

[JAicewizard]

I recently tried cargo-profiler again since I am doing some more rust work.
But it just kept on failing, trough some miracle thinking I somehow came to the conclusion that maybe valgrind got an update making it incompatible.
I downgraded to 3.15, and voila, it actually worked!!! back to 3.16? failed again.
Looking at the callgrind.out the output file looks just a bit different.
here are the patch notes:
note specifially "callgrind_annotate's --auto and --show-percs options now default to 'yes', because they are usually wanted.".
I don't know how to test this but that poped out to me at least as something that could bring incompatibilities.

The results still seem a bit off, and it takes AGES to run, while the benchmark is only 20 seconds long, but i am not sure what is up with that.