Make presubmit lint the "include" dir.

include/v8-debug.h

Index: include/v8-debug.h
diff --git a/include/v8-debug.h b/include/v8-debug.h
index 4314727adc42f30f9a2a572c9f048fa1f6fefce6..f17b848550d0f0736ebda3b7dfa3cd506227f4c4 100755
--- a/include/v8-debug.h
+++ b/include/v8-debug.h
@@ -142,7 +142,7 @@ class EXPORT Debug {
 
     virtual ~Message() {}
   };
-  
+
 
   /**
    * An event details object passed to the debug event listener.
@@ -300,7 +300,7 @@ class EXPORT Debug {
   * get access to information otherwise not available during normal JavaScript
   * execution e.g. details on stack frames. Receiver of the function call will
   * be the debugger context global object, however this is a subject to change.
-  * The following example show a JavaScript function which when passed to 
+  * The following example show a JavaScript function which when passed to
   * v8::Debug::Call will return the current line of JavaScript execution.
   *
   * \code