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))