ArmPlatformPkg: Fix target initialisation in cmd_load_symbols.py

The debugger in Arm Development Studio 2021.2 doesn't work with
"ec = debugger.getExecutionContext(0)" because it's subsequently unable
to access memory. Fix it by switching to
"ec = debugger.getCurrentExecutionContext()".

The documentation for waitForStop() says:

"It is not needed after a call to stop() because stop() is blocking."

So, remove the call to waitForStop.

Signed-off-by: Rebecca Cran <rebecca@bsdio.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>

ArmPlatformPkg/Scripts/Ds5/cmd_load_symbols.py

@@ -85,11 +85,10 @@ else:
 debugger = Debugger()
 
 # Initialisation commands
-ec = debugger.getExecutionContext(0)
+ec = debugger.getCurrentExecutionContext()
 ec.getExecutionService().stop()
-ec.getExecutionService().waitForStop()
 # in case the execution context reference is out of date
-ec = debugger.getExecutionContext(0)
+ec = debugger.getCurrentExecutionContext()
 
 try:
     armplatform_debugger = edk2_debugger.ArmPlatformDebugger(ec, report_file, regions, verbose)