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

fusl/include/sys/statfs.h

Index: fusl/include/sys/statfs.h
diff --git a/fusl/include/sys/statfs.h b/fusl/include/sys/statfs.h
new file mode 100644
index 0000000000000000000000000000000000000000..6f4c6230f7a0a0b81acadbe5cf0d8851a8fd7519
--- /dev/null
+++ b/fusl/include/sys/statfs.h
@@ -0,0 +1,32 @@
+#ifndef	_SYS_STATFS_H
+#define	_SYS_STATFS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <features.h>
+
+#include <sys/statvfs.h>
+
+typedef struct __fsid_t {
+	int __val[2];
+} fsid_t;
+
+#include <bits/statfs.h>
+
+int statfs (const char *, struct statfs *);
+int fstatfs (int, struct statfs *);
+
+#if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)
+#define statfs64 statfs
+#define fstatfs64 fstatfs
+#define fsblkcnt64_t fsblkcnt_t
+#define fsfilcnt64_t fsfilcnt_t
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif