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

fusl/src/env/__stack_chk_fail.c

Index: fusl/src/env/__stack_chk_fail.c
diff --git a/fusl/src/env/__stack_chk_fail.c b/fusl/src/env/__stack_chk_fail.c
new file mode 100644
index 0000000000000000000000000000000000000000..4de82fd9d2f39bd19bf71269b9530eae82552c4e
--- /dev/null
+++ b/fusl/src/env/__stack_chk_fail.c
@@ -0,0 +1,23 @@
+#include <string.h>
+#include <stdint.h>
+#include "pthread_impl.h"
+
+uintptr_t __stack_chk_guard;
+
+void __init_ssp(void *entropy)
+{
+	if (entropy) memcpy(&__stack_chk_guard, entropy, sizeof(uintptr_t));
+	else __stack_chk_guard = (uintptr_t)&__stack_chk_guard * 1103515245;
+
+	__pthread_self()->CANARY = __stack_chk_guard;
+}
+
+void __stack_chk_fail(void)
+{
+	a_crash();
+}
+
+__attribute__((__visibility__("hidden")))
+void __stack_chk_fail_local(void);
+
+weak_alias(__stack_chk_fail, __stack_chk_fail_local);