In Debian 8.1 (Jessie): test failed, nothing works

```
~ > julia -e 'Pkg.add("GnuTLS")'
INFO: Installing GnuTLS v0.0.5
INFO: Installing Nettle v0.1.10
INFO: Building Nettle
INFO: Building GnuTLS
INFO: Package database updated
~ > julia -e 'Pkg.test("GnuTLS")'
INFO: Testing GnuTLS
WARNING: This version of the GnuTLS library (3.3.8) is deprecated
and contains known security vulnerabilities. Please upgrade to a
more recent version.
/usr/local/bin/julia: symbol lookup error: /usr/lib/x86_64-linux-gnu/libhogweed.so.2: undefined symbol: __gmpn_cnd_add_n
===============================[ ERROR: GnuTLS ]================================

failed process: Process(`/usr/local/bin/julia /home/user/.julia/v0.3/GnuTLS/test/runtests.jl`, ProcessExited(127)) [127]

================================================================================
INFO: No packages to install, update or remove
ERROR: GnuTLS had test errors
in error at error.jl:21
in test at pkg/entry.jl:718
in anonymous at pkg/dir.jl:28
in cd at ./file.jl:20
in cd at pkg/dir.jl:28
in test at pkg.jl:67
in process_options at ./client.jl:213
in _start at ./client.jl:354

~ > julia -e 'Pkg.test("Nettle")'
INFO: Testing Nettle
INFO: Nettle tests passed
INFO: No packages to install, update or remove
```

Reinstalling libnettle, libgnutls-deb0-28 doesn't help