added staging test262 tests

test262.conf

@@ -250,9 +250,6 @@ test262/test/built-ins/ThrowTypeError/unique-per-realm-function-proto.js
 #test262/test/built-ins/RegExp/CharacterClassEscapes/
 #test262/test/built-ins/RegExp/property-escapes/
 
-# frequently broken, sometimes contain engine-dependent tests
-test262/test/staging/
-
 # feature regexp-v-flag is missing in the tests
 test262/test/built-ins/RegExp/CharacterClassEscapes/character-class-digit-class-escape-negative-cases.js
 test262/test/built-ins/RegExp/CharacterClassEscapes/character-class-digit-class-escape-negative-cases.js
@@ -327,5 +324,33 @@ test262/test/built-ins/String/prototype/split/cstm-split-on-number-primitive.js
 test262/test/built-ins/String/prototype/split/cstm-split-on-string-primitive.js
 test262/test/built-ins/String/prototype/split/cstm-split-on-string-primitive.js
 
+####################################
+# staging tests
+
+# sort() does not modify the array and we don't update it (XXX: the
+# spec updates it in this case)
+test262/test/staging/sm/Array/frozen-dense-array.js
+
+# not supported
+test262/test/staging/sm/Set/difference.js
+test262/test/staging/sm/Set/intersection.js
+test262/test/staging/sm/Set/is-disjoint-from.js
+test262/test/staging/sm/Set/is-subset-of.js:34
+test262/test/staging/sm/Set/is-superset-of.js:34
+test262/test/staging/sm/Set/symmetric-difference.js
+test262/test/staging/sm/Set/union.js:34
+test262/test/staging/sm/extensions/censor-strict-caller.js
+test262/test/staging/sm/JSON/parse-with-source.js
+
+# no f16
+test262/test/staging/sm/Math/f16round.js
+test262/test/staging/sm/TypedArray/sort_small.js
+test262/test/staging/sm/extensions/dataview.js
+
+# not standard
+test262/test/staging/sm/Function/builtin-no-construct.js
+test262/test/staging/sm/Function/function-caller-restrictions.js
+test262/test/staging/sm/Function/function-toString-builtin-name.js
+
 [tests]
 # list test files or use config.testdir