Mark language/number_identity_test as passing with app jit snapshots.

tests/language/language.status

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # This directory contains tests that are intended to show the
 # current state of the language.
 
 [ ($compiler == none || $compiler == precompiler || $compiler == dart2app || $compiler == dart2appjit) ]
 tearoff_constructor_basic_test: Skip # Crashes in checked mode -- hausner investigating
 generic_methods_type_expression_test: RuntimeError # Issue 25869
@@ skipping 176 matching lines @@
 deferred_load_constants_test: Skip
 tearoff_basic_test: Skip
 deferred_static_seperate_test: Skip
 deferred_constraints_type_annotation_test/new_before_load: Skip
 regress_22443_test: Skip
 
 [ $compiler == precompiler || $compiler == dart2app || $compiler == dart2appjit ]
 ct_const2_test: Skip # Incompatible flag: --compile_all
 hello_dart_test: Skip # Incompatible flag: --compile_all
 
-[ $runtime == dart_app ]
-number_identity_test: RuntimeError # Issue 26873
-
 [ $compiler == precompiler ]
 implicit_closure_test: Skip # Incompatible flag: --use_slow_path
 deopt_inlined_function_lazy_test: Skip # Incompatible flag: --deoptimize-alot
 
 [ $noopt || $compiler == precompiler || $compiler == dart2app || $compiler == dart2appjit ]
 vm/type_vm_test: RuntimeError # Expects line and column numbers
 vm/type_cast_vm_test: RuntimeError # Expects line and column numbers
 
 [ $mode == product ]
 issue13474_test: SkipByDesign # Requires checked mode.
@@ skipping 82 matching lines @@
 assert_initializer_test/*: MissingCompileTimeError, OK  # asserts shouldn't fail in unchecked mode.
 assert_initializer_test/none: pass
 
 [$runtime == vm && $compiler == none && $checked]
 # The VM doesn't enforce that potentially const expressions are actually
 # const expressions when the constructor is called with `const`.
 assert_initializer_test/4*: MissingCompileTimeError # Issue 392.
 
 [$runtime == vm && $compiler == none]
 duplicate_part_test/01: MissingCompileTimeError # Issue 27516