testrunner.py: increase timeout from 60 to 120

greentest/testrunner.py

@@ -34,7 +34,7 @@ one will be selected if not provided.
 # - screws up warnings location, causing them to appear as originated from testrunner.py
 
 # the number of seconds each test script is allowed to run
-DEFAULT_TIMEOUT = 60
+DEFAULT_TIMEOUT = 120
 
 # the number of bytes of output that is recorded; the rest is thrown away
 OUTPUT_LIMIT = 50000