Coreutils can optionally build with libgmp support and for our uses
it's fine to just not build it rather than add the dependency.
(From OE-Core rev: e58ca6504ccfd4fd7efbf288eaadae6720c84c79)
Signed-off-by: Tom Rini <tom_rini@mentor.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>