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

fusl/src/thread/arm/clone.s

Index: fusl/src/thread/arm/clone.s
diff --git a/fusl/src/thread/arm/clone.s b/fusl/src/thread/arm/clone.s
new file mode 100644
index 0000000000000000000000000000000000000000..fe2e0e60ec4c9e5963fe55d5a940f4028f6c39da
--- /dev/null
+++ b/fusl/src/thread/arm/clone.s
@@ -0,0 +1,31 @@
+.syntax unified
+.text
+.global __clone
+.type   __clone,%function
+__clone:
+	stmfd sp!,{r4,r5,r6,r7}
+	mov r7,#120
+	mov r6,r3
+	mov r5,r0
+	mov r0,r2
+	and r1,r1,#-16
+	ldr r2,[sp,#16]
+	ldr r3,[sp,#20]
+	ldr r4,[sp,#24]
+	svc 0
+	tst r0,r0
+	beq 1f
+	ldmfd sp!,{r4,r5,r6,r7}
+	bx lr
+
+1:	mov r0,r6
+	tst r5,#1
+	bne 1f
+	mov lr,pc
+	mov pc,r5
+2:	mov r7,#1
+	svc 0
+
+1:	mov lr,pc
+	bx r5
+	b 2b