Add MLA instruction to ARM integerated assembler.

src/IceAssemblerARM32.h

Index: src/IceAssemblerARM32.h
diff --git a/src/IceAssemblerARM32.h b/src/IceAssemblerARM32.h
index 6cd120e5e864b65a9d01c559e6538f3c777d6445..cbf94a35f1d37ce821ea4f8de193b7f2d5aed23f 100644
--- a/src/IceAssemblerARM32.h
+++ b/src/IceAssemblerARM32.h
@@ -172,6 +172,9 @@ public:
 
   void movt(const Operand *OpRd, const Operand *OpSrc, CondARM32::Cond Cond);
 
+  void mla(const Operand *OpRd, const Operand *OpRn, const Operand *OpRm,
+           const Operand *OpRa, CondARM32::Cond Cond);
+
   void mul(const Operand *OpRd, const Operand *OpRn, const Operand *OpSrc1,
            bool SetFlags, CondARM32::Cond Cond);