usertools: add huge page setup script

usertools: add huge page setup script

This is an improved version of the setup of huge pages
bases on earlier DPDK setup.

Differences are:
   * autodetects NUMA vs non NUMA
   * allows setting different page sizes
     recent kernels support multiple sizes.
   * accepts a parameter in bytes (not pages).
   * can display current hugepage settings.

Most users will just use --setup argument but if necessary
the steps of clearing old settings and mounting/umounting
can be done individually.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>