include cocoa in nodewrapper.h since we use that include outside of anything that already includes cocoa, and it relies on cocoa apis

Author: joelrbrandt

src/mac/node-shell/node-shell/NodeWrapper.h

@@ -7,6 +7,7 @@
 //
 
 #import <Foundation/Foundation.h>
+#import <Cocoa/Cocoa.h>
 
 @interface NodeWrapper : NSObject {
     NSTask *task;