Bug#849223: src:ovito: pybind11 vendored in ovito

[Ghislain Antony Vaillant]

Package: src:ovito
Severity: normal

Dear Maintainer,

I noticed that ovito vendors a copy of pybind11, however the latter is
now available in Debian.

pybind11 is used in `src/plugins/PyScript.h` and does not seem to be
discovered by CMake. So a patch to use the system version should simply
involve changing these paths, hopefully.

Ghis


-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (900, 'testing'), (300, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.8.0-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)