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

fusl/src/mq/mq_unlink.c

Index: fusl/src/mq/mq_unlink.c
diff --git a/fusl/src/mq/mq_unlink.c b/fusl/src/mq/mq_unlink.c
new file mode 100644
index 0000000000000000000000000000000000000000..6a08a4c57eaa69088e4dc20afd55a69989a0eacd
--- /dev/null
+++ b/fusl/src/mq/mq_unlink.c
@@ -0,0 +1,16 @@
+#include <mqueue.h>
+#include <errno.h>
+#include "syscall.h"
+
+int mq_unlink(const char *name)
+{
+	int ret;
+	if (*name == '/') name++;
+	ret = __syscall(SYS_mq_unlink, name);
+	if (ret < 0) {
+		if (ret == -EPERM) ret = -EACCES;
+		errno = -ret;
+		return -1;
+	}
+	return ret;
+}