[lldb] update TestEchoCommands

Followup to https://reviews.llvm.org/D112988

Sorry, I broke this test.   The test was verifying the bad behavior
of --source-quietly that the previous change fixed -- namely that
it still echos the initial list of startup commands while
sourcing them.

Updated the test to verify that --source-quietly is quiet, rather than
loud.

Reviewed By: JDevlieghere

Differential Revision: https://reviews.llvm.org/D113047

(cherry picked from commit 7f01f78)

Author: smoofra

lldb/test/Shell/Settings/Inputs/EchoCommandsQuiet.out

@@ -1,2 +1,4 @@
-# CHECK: (lldb) command source -s 1 {{.*\n}}
-# CHECK-NEXT: (lldb) command source -s 1 {{.*\n}}
+CHECK: start
+CHECK-NOT: source
+CHECK-NOT: lldb
+CHECK-NEXT: done

lldb/test/Shell/Settings/TestEchoCommands.test

@@ -1,4 +1,4 @@
 # RUN: %lldb -x -b -o 'settings set interpreter.echo-comment-commands true'  -s %S/Inputs/EchoCommandsTest.in | FileCheck %S/Inputs/EchoCommandsAll.out
 # RUN: %lldb -x -b -o 'settings set interpreter.echo-comment-commands false' -s %S/Inputs/EchoCommandsTest.in | FileCheck %S/Inputs/EchoCommandsNoComments.out
 # RUN: %lldb -x -b -o 'settings set interpreter.echo-commands false'         -s %S/Inputs/EchoCommandsTest.in | FileCheck %S/Inputs/EchoCommandsNone.out
-# RUN: %lldb -x -b --source-quietly                                          -s %S/Inputs/EchoCommandsTest.in | FileCheck %S/Inputs/EchoCommandsQuiet.out
+# RUN: ( echo start ; %lldb -x -b --source-quietly -s %S/Inputs/EchoCommandsTest.in ; echo done )             | FileCheck  %S/Inputs/EchoCommandsQuiet.out