sim:tests: track boot msg changes

Tock is less verbose; pick a different msg to verify the early bootstrap
completed.

Change-Id: Iff2e73f6bdb86ec2f3515e770f906c80865a8375

shodan_sel4test.robot

diff --git a/shodan_sel4test.robot b/shodan_sel4test.robot
index 0ccc573..a700aad 100644
--- a/shodan_sel4test.robot
+++ b/shodan_sel4test.robot
@@ -75,7 +75,7 @@
     ${sel4uart}=                Create Terminal Tester        ${UART5}
     Start Emulation
 
-    Wait For Line On Uart       load_sel4() completed successfully               testerId=${tockuart}
+    Wait For Line On Uart       SEC: Booting seL4 from TockOS app done!          testerId=${tockuart}
     Wait For Line On Uart       Booting all finished, dropped to user space      testerId=${sel4uart}
     Wait For Line On Uart       MCS configuration                                testerId=${sel4uart}
     Wait For Line On Uart       Starting test suite sel4test                     testerId=${sel4uart}