Add a "fork" of musl as //fusl.

fusl/src/stat/futimesat.c

Index: fusl/src/stat/futimesat.c
diff --git a/fusl/src/stat/futimesat.c b/fusl/src/stat/futimesat.c
new file mode 100644
index 0000000000000000000000000000000000000000..b4eea1d3c440be057012e0ef82efc38ad74219d9
--- /dev/null
+++ b/fusl/src/stat/futimesat.c
@@ -0,0 +1,23 @@
+#define _GNU_SOURCE
+#include <sys/time.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include "syscall.h"
+#include "libc.h"
+
+int __futimesat(int dirfd, const char *pathname, const struct timeval times[2])
+{
+	struct timespec ts[2];
+	if (times) {
+		int i;
+		for (i=0; i<2; i++) {
+			if (times[i].tv_usec >= 1000000ULL)
+				return __syscall_ret(-EINVAL);
+			ts[i].tv_sec = times[i].tv_sec;
+			ts[i].tv_nsec = times[i].tv_usec * 1000;
+		}
+	}
+	return utimensat(dirfd, pathname, times ? ts : 0, 0);
+}
+
+weak_alias(__futimesat, futimesat);