nfs-utils: Disable format-overflow as Werror

These warnings are intricate and we can ignore that for now as they are
being found by gcc 9, eventually this should be not needed when code
upstream is fixed

(From OE-Core rev: 42176d26e5c893e86ab5d8a2e5b8a3d021e03a69)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-connectivity/nfs-utils/nfs-utils_2.3.3.bb

@@ -64,6 +64,8 @@ EXTRA_OECONF = "--with-statduser=rpcuser \
                 --with-statdpath=/var/lib/nfs/statd \
                "
 
+CFLAGS += "-Wno-error=format-overflow"
+
 PACKAGECONFIG ??= "tcp-wrappers \
     ${@bb.utils.filter('DISTRO_FEATURES', 'ipv6', d)} \
 "