Bump version of libarchive

[Zaharid]

If I try to set up a clean environment on linux I get essentially this
error:

conda/conda#8838

when trying to import NNPDF, which as said on the issue gets solved if
one installs libiconv manually. Indeed checking libarchive with ldd
I see that it is asking for libiconv and not finding it.

It seems there is some amount of dancing around of dancing around in the
conda forge channel with it being added

conda-forge/libarchive-feedstock#36

and then removed

conda-forge/libarchive-feedstock#59

and seems that that somehow can result in an incompatible environment.

Pull to the latest version (and be stricter with
pinning in hopes that resolves the problem.

[Zaharid]

Ok so this manages to fail at compile time

/root/miniconda3/conda-bld/nnpdf_1614969218489/_build_env/bin/../lib/gcc/x86_64-conda_cos6-linux-gnu/7.3.0/../../../../x86_64-conda_cos6-linux-gnu/bin/ld: /root/miniconda3/conda-bld/nnpdf_1614969218489/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_p/lib/libarchive.so: undefined reference to `libiconv'
collect2: error: ld returned 1 exit status
make[2]: *** [libnnpdf/FKmerge2] Error 1

[siranipour]

How come the travis builds weren't failing for other PRs? Or were they?

[Zaharid]

I think it is pulling a new version later at runtime, as we didn't constrain it very much.

[Zaharid]

Spent a while trying to reliably reproduce this issue so i can report but I have no idea of what is going on. If I just try to install libarchive I get a version that seems to work fine. Anyhow it should be good enough for what we are trying to do.

[scarlehoff]

I'm not sure what the error is or should be but if I do a "vanilla" conda install nnpdf I get this version of libarchive so I guess it is ok to pin it. Not entirely sure how to test this issue because I don't think I've seen it.