add legacy futimes and lutimes functions

based on patch by sh4rm4. these functions are deprecated; futimens and
utimensat should be used instead in new programs.

src/misc/futimes.c

@@ -0,0 +1,13 @@
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <fcntl.h>
+
+int futimes(int fd, const struct timeval tv[2])
+{
+	struct timespec times[2];
+	times[0].tv_sec  = tv[0].tv_sec;
+	times[0].tv_nsec = tv[0].tv_usec * 1000;
+	times[1].tv_sec  = tv[1].tv_sec;
+	times[1].tv_nsec = tv[1].tv_usec * 1000;
+	return futimens(fd, times);
+}

src/misc/lutimes.c

@@ -0,0 +1,13 @@
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <fcntl.h>
+
+int lutimes(const char *filename, const struct timeval tv[2])
+{
+	struct timespec times[2];
+	times[0].tv_sec  = tv[0].tv_sec;
+	times[0].tv_nsec = tv[0].tv_usec * 1000;
+	times[1].tv_sec  = tv[1].tv_sec;
+	times[1].tv_nsec = tv[1].tv_usec * 1000;
+	return utimensat(AT_FDCWD, filename, times, AT_SYMLINK_NOFOLLOW);
+}