executor: update special fuchsia syscalls

zx_clock_get_monotonic was added,
zx_debuglog_read was renamed (or we forgot to add it earlier).

executor/executor_fuchsia.h

@@ -21,9 +21,11 @@ static long execute_syscall(const call_t* c, long a[kMaxArgs])
 	long res = c->call(a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8]);
 	if (strncmp(c->name, "zx_", 3) == 0) {
 		// Convert zircon error convention to the libc convention that executor expects.
+		// The following calls return arbitrary integers instead of error codes.
 		if (res == ZX_OK ||
-		    !strcmp(c->name, "zx_log_read") ||
+		    !strcmp(c->name, "zx_debuglog_read") ||
 		    !strcmp(c->name, "zx_clock_get") ||
+		    !strcmp(c->name, "zx_clock_get_monotonic") ||
 		    !strcmp(c->name, "zx_ticks_get"))
 			return 0;
 		errno = (-res) & 0x7f;