Add CMP(register) and CMP(Immediate) to ARM integerated assembler.

src/IceInstARM32.h

Index: src/IceInstARM32.h
diff --git a/src/IceInstARM32.h b/src/IceInstARM32.h
index e7d9e4c9df6d7f71e991501e17dd2a659b56c802..28317d270f13cff97b6dd338fe31fe0855d48c4b 100644
--- a/src/IceInstARM32.h
+++ b/src/IceInstARM32.h
@@ -717,6 +717,7 @@ public:
       return;
     emitCmpLike(Opcode, this, Func);
   }
+  void emitIAS(const Cfg *Func) const override;
   void dump(const Cfg *Func) const override {
     if (!BuildDefs::dump())
       return;