Increase gcstress timeout on host as well.

Give the host more time to run the gcstress tests as well.
We have been using the minimal timeout for gcstress debug so far.

Bug: 187254257
Change-Id: I5c2a4c65cc8054b78c7125df79e55a252ae1ae13
diff --git a/tools/run-libcore-tests.py b/tools/run-libcore-tests.py
index afbc62f..2eb3093 100755
--- a/tools/run-libcore-tests.py
+++ b/tools/run-libcore-tests.py
@@ -123,7 +123,7 @@
 
 def get_timeout_secs():
   default_timeout_secs = 600
-  if args.mode == "device" and args.gcstress:
+  if args.gcstress:
     default_timeout_secs = 1200
     if args.debug:
       default_timeout_secs = 1800