Bug 1208199 - Skip test_osfile_async_setDates.js on b2g debug, where it fails constantly

toolkit/components/osfile/tests/xpcshell/xpcshell.ini

@@ -17,6 +17,7 @@ support-files =
 [test_osfile_async_flush.js]
 [test_osfile_async_largefiles.js]
 [test_osfile_async_setDates.js]
+skip-if = (toolkit == 'gonk' && debug) # Bug 1208199
 [test_removeEmptyDir.js]
 [test_makeDir.js]
 [test_file_URL_conversion.js]