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

fusl/src/thread/or1k/clone.s

Index: fusl/src/thread/or1k/clone.s
diff --git a/fusl/src/thread/or1k/clone.s b/fusl/src/thread/or1k/clone.s
new file mode 100644
index 0000000000000000000000000000000000000000..02f380bd5f96db837840e4be2365c24e61252155
--- /dev/null
+++ b/fusl/src/thread/or1k/clone.s
@@ -0,0 +1,30 @@
+/* int clone(fn, stack, flags, arg, ptid, tls, ctid)
+ *           r3  r4     r5     r6   sp+0  sp+4 sp+8
+ * sys_clone(flags, stack, ptid, ctid, tls)
+ */
+.global __clone
+.type   __clone,@function
+__clone:
+	l.addi	r4, r4, -8
+	l.sw	0(r4), r3
+	l.sw	4(r4), r6
+	/* (fn, st, fl, ar, pt, tl, ct) => (fl, st, pt, ct, tl) */
+	l.ori	r3, r5, 0
+	l.lwz	r5, 0(r1)
+	l.lwz	r6, 8(r1)
+	l.lwz	r7, 4(r1)
+	l.ori	r11, r0, 220 /* __NR_clone */
+	l.sys	1
+
+	l.sfeqi	r11, 0
+	l.bf	1f
+	 l.nop
+	l.jr	r9
+	 l.nop
+
+1:	l.lwz	r11, 0(r1)
+	l.jalr	r11
+	 l.lwz	r3, 4(r1)
+
+	l.ori	r11, r0, 93 /* __NR_exit */
+	l.sys	1