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

fusl/src/ctype/iswgraph.c

Index: fusl/src/ctype/iswgraph.c
diff --git a/fusl/src/ctype/iswgraph.c b/fusl/src/ctype/iswgraph.c
new file mode 100644
index 0000000000000000000000000000000000000000..0ea5ca3a4d57ea52c08ea53ea78df5e6b17c00d9
--- /dev/null
+++ b/fusl/src/ctype/iswgraph.c
@@ -0,0 +1,15 @@
+#include <wctype.h>
+#include "libc.h"
+
+int iswgraph(wint_t wc)
+{
+	/* ISO C defines this function as: */
+	return !iswspace(wc) && iswprint(wc);
+}
+
+int __iswgraph_l(wint_t c, locale_t l)
+{
+	return iswgraph(c);
+}
+
+weak_alias(__iswgraph_l, iswgraph_l);