C++: Fix names of functions dealing with enclosing scopes

...in order to better tell apart the type related functions
isScope()/asScope() and the functions dealing with enclosing scopes:

    * scope() --> enclosingScope()
    * setScope() --> setEnclosingScope()
    * resetScope() --> resetEnclosingScope()

Change-Id: Id743a7d1b6a1a1a0ffcd8568cbd8ebbdfc16eaa1
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>

src/libs/cplusplus/CppRewriter.cpp

@@ -158,7 +158,7 @@ public:
 
                 // the copy() call above set the scope to 'type'
                 // reset it to 0 before adding addMember to avoid assert
-                newArg->resetScope();
+                newArg->resetEnclosingScope();
                 funTy->addMember(newArg);
             }