2.0.11 release if libnuma/numactl

The current version of libnuma and numactl is now released as 2.0.11.

The github repo has been tagged with v2.0.11:
  https://github.com/numactl/numactl/releases/tag/v2.0.11

The latest tarball is available for download at:
  ftp://oss.sgi.com/www/projects/libnuma/download/numactl-2.0.11.tar.gz

This version includes two new commits:
- 150116 libnuma: numa_node_to_cpu skips over non-existing nodes (Petr Holasek)
- 151210 libnuma: supress warnings for non-existing node (Petr Holasek)

Furthermore, the tarball for 2.0.11 was generated using `make dist`,
fixing the issue with the 2.0.10 tarball that did not include the
`configure` script and auxiliary file and required running
autoconf/automake.

Thanks!
Filipe