edac-utils: update the version

The current edac-utils is v0.18, not v0.16 as the declaration in NEWS file:
  -------------------------------
  | Version 0.18 (2011-11-09);
  |- Do not print "No errors to report" with edac-util --quiet
  |- Add DIMM labels for Intel S2600JF and Supermicro H8QG6
  -------------------------------

Signed-off-by: Roy Li <rongqing.li@windriver.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>