ntp: bump to version 4.2.6p3 and fix glibc build failure

Bump to version 4.2.6p3 and fix a build failure with external toolchains
that use certain glibc versions as point out by speakman on IRC.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Acked-by: Daniel Nyström <daniel.nystrom@timeterminal.se>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/ntp/ntp-nano.patch

@@ -0,0 +1,23 @@
+Fixes issues with glibc header files, see
+http://bugs.gentoo.org/show_bug.cgi?id=270483
+
+Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
+
+diff -Nura ntp-4.2.6p2.orig/include/ntp_syscall.h ntp-4.2.6p2/include/ntp_syscall.h
+--- ntp-4.2.6p2.orig/include/ntp_syscall.h	2009-12-09 04:36:37.000000000 -0300
++++ ntp-4.2.6p2/include/ntp_syscall.h	2011-01-27 13:09:05.072336628 -0300
+@@ -14,6 +14,14 @@
+ # include <sys/timex.h>
+ #endif
+ 
++#if defined(ADJ_NANO) && !defined(MOD_NANO)
++#define MOD_NANO ADJ_NANO
++#endif
++
++#if defined(ADJ_TAI) && !defined(MOD_TAI)
++#define MOD_TAI ADJ_TAI
++#endif
++
+ #ifndef NTP_SYSCALLS_LIBC
+ #ifdef NTP_SYSCALLS_STD
+ # define ntp_adjtime(t)		syscall(SYS_ntp_adjtime, (t))

package/ntp/ntp.mk

@@ -3,7 +3,7 @@
 # ntp
 #
 #############################################################
-NTP_VERSION = 4.2.6p2
+NTP_VERSION = 4.2.6p3
 NTP_SOURCE = ntp-$(NTP_VERSION).tar.gz
 NTP_SITE = http://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-4.2