Fix android debug build.

test/cctest/compiler/test-gap-resolver.cc

Index: test/cctest/compiler/test-gap-resolver.cc
diff --git a/test/cctest/compiler/test-gap-resolver.cc b/test/cctest/compiler/test-gap-resolver.cc
index 60a476286157ce4be31d58a6be155feb2495c7cd..00c220945da891cdd4accfd4cc01f0c27d581db0 100644
--- a/test/cctest/compiler/test-gap-resolver.cc
+++ b/test/cctest/compiler/test-gap-resolver.cc
@@ -123,7 +123,8 @@ class ParallelMoveCreator : public HandleAndZoneScope {
 
  private:
   struct InstructionOperandComparator {
-    bool operator()(const InstructionOperand* x, const InstructionOperand* y) {
+    bool operator()(const InstructionOperand* x,
+                    const InstructionOperand* y) const {
       return (x->kind() < y->kind()) ||
              (x->kind() == y->kind() && x->index() < y->index());
     }