Retain script path of parent isolate when spawnFunction is called so that

tests/standalone/standalone.status

Index: tests/standalone/standalone.status
===================================================================
--- tests/standalone/standalone.status	(revision 29176)
+++ tests/standalone/standalone.status	(working copy)
@@ -55,10 +55,12 @@
 coverage_test: Skip
 http_launch_test: Skip
 vmservice/*: Skip # Do not run standalone vm service tests in browser.
+issue14236_test: Skip # Issue 14236 Script snapshots do not work in the browser.
 
 
 [ $compiler == dartanalyzer ]
 javascript_int_overflow_literal_test/01: fail, ok
+issue14236_test: Skip # Analyzer can't handle Script snapshots.
 
 # test issue https://code.google.com/p/dart/issues/detail?id=11518
 io/file_constructor_test: fail
@@ -123,6 +125,7 @@
 javascript_int_overflow_literal_test: Skip
 oom_error_stacktrace_test: RuntimeError, OK # (OOM on JS may produce a stacktrace).
 vmservice/*: Skip # Do not run standalone vm service tests with dart2js.
+issue14236_test: Skip # dart2js does not deal with Script snapshots.
 
 # Suppress tests that use main(List<String> args) until issue 14200 is fixed.
 io/secure_builtin_roots_test: Fail # Issue 14200