ntp: fix build without SSP support

In version 4.2.8p11 ntp changed its configure script build hardening
parameter to '--with-hardenfile'. Update the parameter name to avoid
-fstack-protector-all when the toolchain does not support this option.

Fixes:
http://autobuild.buildroot.net/results/60e/60e8b9864932f2cabc7deb43234abe168bd113c5/
http://autobuild.buildroot.net/results/592/592db6836817bb078a2f1146d2ce6241bf7997a3/
http://autobuild.buildroot.net/results/b07/b070fbc66a928888df8d2561dad3632778d55e0d/

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 5766b6fb34a897092092f7d76d6b4f2bc8c48571)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/ntp/ntp.mk

@@ -30,9 +30,9 @@ NTP_CONF_OPTS += --without-crypto --disable-openssl-random
 endif
 
 ifeq ($(BR2_TOOLCHAIN_HAS_SSP),y)
-NTP_CONF_OPTS += --with-locfile=linux
+NTP_CONF_OPTS += --with-hardenfile=linux
 else
-NTP_CONF_OPTS += --with-locfile=default
+NTP_CONF_OPTS += --with-hardenfile=default
 endif
 
 ifeq ($(BR2_PACKAGE_LIBCAP),y)