sim:tests: Extend the log tester timeout

When testing MobilenetV1 execution, the task takes about the set 1s
virtual time timeout to finish, which makes the test flaky. Extend
the timeout to make the test more stable.

Change-Id: I37c0120b64f32d7c69a8f83356d6938ff1cac88a

shodan_boot.robot

diff --git a/shodan_boot.robot b/shodan_boot.robot
index f8de7db..a9e4ecd 100644
--- a/shodan_boot.robot
+++ b/shodan_boot.robot
@@ -6,7 +6,7 @@
 Resource                        ${RENODEKEYWORDS}
 
 *** Variables ***
-${LOG_TIMEOUT}                   1
+${LOG_TIMEOUT}                   2
 ${ROOTDIR}                       @${CURDIR}/../..
 ${SCRIPT}                        sim/config/shodan.resc
 ${PROMPT}                        KATA>