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

fusl/src/locale/wcscoll.c

Index: fusl/src/locale/wcscoll.c
diff --git a/fusl/src/locale/wcscoll.c b/fusl/src/locale/wcscoll.c
new file mode 100644
index 0000000000000000000000000000000000000000..14bb8b9f9607991872e9c1861481ce8ea07df88e
--- /dev/null
+++ b/fusl/src/locale/wcscoll.c
@@ -0,0 +1,17 @@
+#include <wchar.h>
+#include <locale.h>
+#include "locale_impl.h"
+#include "libc.h"
+
+/* FIXME: stub */
+int __wcscoll_l(const wchar_t *l, const wchar_t *r, locale_t locale)
+{
+	return wcscmp(l, r);
+}
+
+int wcscoll(const wchar_t *l, const wchar_t *r)
+{
+	return __wcscoll_l(l, r, CURRENT_LOCALE);
+}
+
+weak_alias(__wcscoll_l, wcscoll_l);