man: Remove size field from fi_info description

The size field is no longer part of fi_info.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Link to librt

Needed for clock_gettime

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Merge pull request #129 from shefty/master

Fixup man page and build