Fix Thumb-2 setjmp.

Many Thumb-2 instructions cannot use sp or pc as operands, and the
assembler now diagnoses these.  setjmp had one such instruction, movs;
this patch changes it to mov.

Signed-off-by: Joseph Myers <joseph@codesourcery.com>

libc/sysdeps/linux/arm/setjmp.S

@@ -47,7 +47,7 @@ __sigsetjmp:
 	mov	ip, r0
 #if defined(__thumb2__)
 	stmia	ip!, {v1-v6, sl, fp}
-	movs	r2, sp
+	mov	r2, sp
 	stmia	ip!, {r2, lr}
 #else
 	/* Save registers */