Instrumented malloc and free with dummy functions.

BUG=https://bugs.chromium.org/p/nativeclient/issues/detail?id=4374
R=kschimpf@google.com, stichnot@chromium.org

Review URL: https://codereview.chromium.org/2079723002 .

src/IceASanInstrumentation.h

diff --git a/src/IceASanInstrumentation.h b/src/IceASanInstrumentation.h
index 761a332..e1222b4 100644
--- a/src/IceASanInstrumentation.h
+++ b/src/IceASanInstrumentation.h
@@ -40,9 +40,9 @@
                                 VariableDeclaration *RzArray,
                                 SizeT &RzArraySize,
                                 VariableDeclaration *Global);
-  void instrumentLoad(LoweringContext &Context, const InstLoad *Inst) override;
-  void instrumentStore(LoweringContext &Context,
-                       const InstStore *Inst) override;
+  void instrumentCall(LoweringContext &Context, InstCall *Instr) override;
+  void instrumentLoad(LoweringContext &Context, InstLoad *Instr) override;
+  void instrumentStore(LoweringContext &Context, InstStore *Instr) override;
   void instrumentAccess(LoweringContext &Context, Operand *Op, SizeT Size);
   void instrumentStart(Cfg *Func) override;
   bool DidInsertRedZones = false;