package/ntp: fix build for toolchains without ssp

ntp defaults to use ssp support
http://bk1.ntp.org/ntp-stable/sntp/harden/README

by using these flags
http://bk1.ntp.org/ntp-stable/sntp/harden/linux

If the toolchain lacks SSP support this patch forces ntp to use an
empty set of flags: http://bk1.ntp.org/ntp-stable/sntp/harden/default

Fixes
http://autobuild.buildroot.net/results/1d5/1d58bd8745b22c8eb71fea4c7255d3ace69f6f7a/

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/ntp/ntp.mk

@@ -23,6 +23,12 @@ NTP_CONF_OPTS = \
 # 0002-ntp-syscalls-fallback.patch
 NTP_AUTORECONF = YES
 
+ifeq ($(BR2_TOOLCHAIN_HAS_SSP),y)
+NTP_CONF_OPTS += --with-locfile=linux
+else
+NTP_CONF_OPTS += --with-locfile=default
+endif
+
 ifeq ($(BR2_PACKAGE_LIBCAP),y)
 NTP_CONF_OPTS += --enable-linuxcaps
 NTP_DEPENDENCIES += libcap