[presubmit] Enable readability/namespace linter checking.

src/compiler/c-linkage.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/assembler.h"
 #include "src/macro-assembler.h"
 
 #include "src/compiler/linkage.h"
 
 #include "src/zone.h"
@@ skipping 205 matching lines @@
       target_loc,                    // target location
       msig,                          // machine_sig
       locations.Build(),             // location_sig
       0,                             // stack_parameter_count
       Operator::kNoProperties,       // properties
       kCalleeSaveRegisters,          // callee-saved registers
       kCalleeSaveFPRegisters,        // callee-saved fp regs
       CallDescriptor::kNoFlags,      // flags
       "c-call");
 }
-}
-}
-}
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8