Allow Platform.executable for JIT app snapshots.

tests/standalone/standalone.status

 # Copyright (c) 2013, 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.
 
 # WARNING:
 # Tests using the multitest feature where failure is expected should *also* be
 # listed in tests/lib/analyzer/analyze_tests.status without the "standalone"
 # prefix.
 
 packages_file_test: Skip # Issue 26715
@@ skipping 225 matching lines @@
 io/code_collection_test: Skip # Platform.executable
 full_coverage_test: Skip # Platform.executable
 regress_26031_test: Skip # Platform.resolvedExecutable
 
 [ $compiler == precompiler || $compiler == dart2app || $compiler == dart2appjit ]
 io/compile_all_test: Skip # Incompatible flag --compile_all
 
 [ $runtime == dart_app ]
 io/stdout_bad_argument_test: Skip # Test exits and so can't generate snapshot.
 
-[ $runtime == dart_precompiled || $runtime == dart_app ]
+[ $runtime == dart_precompiled ]
 full_coverage_test: Skip # Platform.executable
 http_launch_test: Skip # Platform.executable
 io/addlatexhash_test: Skip # Platform.executable
 io/file_read_special_device_test: Skip # Platform.executable
 io/file_stream_test: Skip # Platform.executable
 io/file_test: Skip # Platform.executable
 io/http_cross_process_test: Skip # Platform.executable
 io/https_unauthorized_test: Skip # Platform.executable
 io/platform_resolved_executable_test: Skip # Platform.resolvedExecutable
 io/skipping_dart2js_compilations_test: Skip # Platform.executable
@@ skipping 106 matching lines @@
 package/*: SkipByDesign # Launches VMs in interesting ways.
 
 [ $builder_tag == no_ipv6 ]
 io/http_bind_test: Skip
 io/raw_datagram_socket_test: Skip
 io/socket_source_address_test: Skip
 io/socket_bind_test: Skip
 io/http_proxy_advanced_test: Skip
 io/http_ipv6_test: Skip
 io/socket_ipv6_test: Skip