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

fusl/include/malloc.h

Index: fusl/include/malloc.h
diff --git a/fusl/include/malloc.h b/fusl/include/malloc.h
new file mode 100644
index 0000000000000000000000000000000000000000..35f8b19c2c340d510c7aeaf4a5401b54acbc1d0b
--- /dev/null
+++ b/fusl/include/malloc.h
@@ -0,0 +1,25 @@
+#ifndef _MALLOC_H
+#define _MALLOC_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define __NEED_size_t
+
+#include <bits/alltypes.h>
+
+void *malloc (size_t);
+void *calloc (size_t, size_t);
+void *realloc (void *, size_t);
+void free (void *);
+void *valloc (size_t);
+void *memalign(size_t, size_t);
+
+size_t malloc_usable_size(void *);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif