tools: treat SIGABRT as crash

Otherwise, potentially no output is shown for aborts.

PR-URL: nodejs#19990
Refs: nodejs#19903
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>

tools/test.py

@@ -582,8 +582,7 @@ def HasCrashed(self):
       # Timed out tests will have exit_code -signal.SIGTERM.
       if self.output.timed_out:
         return False
-      return self.output.exit_code < 0 and \
-             self.output.exit_code != -signal.SIGABRT
+      return self.output.exit_code < 0
 
   def HasTimedOut(self):
     return self.output.timed_out;