NetBSD compilation fix

Similar to other BSD variants, it needs USE_ST_TIMESPEC.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Makefile

@@ -764,6 +764,7 @@ ifeq ($(uname_S),NetBSD)
 	BASIC_CFLAGS += -I/usr/pkg/include
 	BASIC_LDFLAGS += -L/usr/pkg/lib $(CC_LD_DYNPATH)/usr/pkg/lib
 	THREADED_DELTA_SEARCH = YesPlease
+	USE_ST_TIMESPEC = YesPlease
 endif
 ifeq ($(uname_S),AIX)
 	NO_STRCASESTR=YesPlease

git-compat-util.h

@@ -46,6 +46,7 @@
 #define _ALL_SOURCE 1
 #define _GNU_SOURCE 1
 #define _BSD_SOURCE 1
+#define _NETBSD_SOURCE 1
 
 #include <unistd.h>
 #include <stdio.h>