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

fusl/src/ctype/__ctype_tolower_loc.c

Index: fusl/src/ctype/__ctype_tolower_loc.c
diff --git a/fusl/src/ctype/__ctype_tolower_loc.c b/fusl/src/ctype/__ctype_tolower_loc.c
new file mode 100644
index 0000000000000000000000000000000000000000..efb9910545c4a536eaf2079fb403343232654225
--- /dev/null
+++ b/fusl/src/ctype/__ctype_tolower_loc.c
@@ -0,0 +1,30 @@
+#include <stdint.h>
+
+static const int32_t table[] = {
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
+16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,
+32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,
+48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,
+64,
+'a','b','c','d','e','f','g','h','i','j','k','l','m',
+'n','o','p','q','r','s','t','u','v','w','x','y','z',
+91,92,93,94,95,96,
+'a','b','c','d','e','f','g','h','i','j','k','l','m',
+'n','o','p','q','r','s','t','u','v','w','x','y','z',
+123,124,125,126,127,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+};
+
+static const int32_t *const ptable = table+128;
+
+const int32_t **__ctype_tolower_loc(void)
+{
+	return (void *)&ptable;
+}