Previews should exclude a property if its name is a symbol

test/inspector/runtime/evaluate-with-generate-preview-expected.txt

Index: test/inspector/runtime/evaluate-with-generate-preview-expected.txt
diff --git a/test/inspector/runtime/evaluate-with-generate-preview-expected.txt b/test/inspector/runtime/evaluate-with-generate-preview-expected.txt
index bef284bf398087918b24ac9dfd9de437d0a3c8a3..c578ad05b1785873cdd210ea398122a89f8ba36a 100644
--- a/test/inspector/runtime/evaluate-with-generate-preview-expected.txt
+++ b/test/inspector/runtime/evaluate-with-generate-preview-expected.txt
@@ -17,10 +17,15 @@ Running test: testObjectPropertiesPreview
         }
         [2] : {
             name : p3
-            type : accessor
+            type : symbol
+            value : Symbol(123)
         }
         [3] : {
-            name : p5
+            name : p4
+            type : accessor
+        }
+        [4] : {
+            name : p6
             type : accessor
         }
     ]
@@ -29,7 +34,7 @@ Running test: testObjectPropertiesPreview
 
 Running test: testArrayPropertiesPreview
 {
-    description : Array(7)
+    description : Array(8)
     overflow : false
     properties : [
         [0] : {
@@ -45,10 +50,15 @@ Running test: testArrayPropertiesPreview
         }
         [2] : {
             name : 4
-            type : accessor
+            type : symbol
+            value : Symbol(123)
         }
         [3] : {
-            name : 6
+            name : 5
+            type : accessor
+        }
+        [4] : {
+            name : 7
             type : accessor
         }
     ]