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

fusl/src/thread/mips/clone.s

Index: fusl/src/thread/mips/clone.s
diff --git a/fusl/src/thread/mips/clone.s b/fusl/src/thread/mips/clone.s
new file mode 100644
index 0000000000000000000000000000000000000000..37dddf57ba9575c9e849b03ad195b0caea1ddf4a
--- /dev/null
+++ b/fusl/src/thread/mips/clone.s
@@ -0,0 +1,32 @@
+.set noreorder
+.global __clone
+.type   __clone,@function
+__clone:
+	# Save function pointer and argument pointer on new thread stack
+	and $5, $5, -8
+	subu $5, $5, 16
+	sw $4, 0($5)
+	sw $7, 4($5)
+	# Shuffle (fn,sp,fl,arg,ptid,tls,ctid) to (fl,sp,ptid,tls,ctid)
+	move $4, $6
+	lw $6, 16($sp)
+	lw $7, 20($sp)
+	lw $9, 24($sp)
+	subu $sp, $sp, 16
+	sw $9, 16($sp)
+	li $2, 4120
+	syscall
+	beq $7, $0, 1f
+	nop
+	addu $sp, $sp, 16
+	jr $ra
+	subu $2, $0, $2
+1:	beq $2, $0, 1f
+	nop
+	addu $sp, $sp, 16
+	jr $ra
+	nop
+1:	lw $25, 0($sp)
+	lw $4, 4($sp)
+	jr $25
+	nop