[lldb] correct inconsistent order of messages on process launch (#73173)

Fixes [#68035](#68035), where
an inconsistency in the order of "Process launched" and "Process
stopped" messages occurs during `process launch`.

The fix involves adjusting the message output sequence in
`CommandObjectProcessLaunch::DoExecute` within
`source/Commands/CommandObjectProcess.cpp`. This ensures "Process
launched" consistently precedes "Process stopped" when executing
commands with the '-o' flag, i.e., non-interactive mode.

Upon implementing this change, two tests failed:
`lldb/test/Shell/Breakpoint/jit-loader_jitlink_elf.test` and
`lldb/test/Shell/Breakpoint/jit-loader_rtdyld_elf.test`. These failures
were expected as they relied on the previous, now-corrected message
order. Updating these tests to align with the new message sequence is
part of this PR's scope.

Author: junior-jl

lldb/source/Commands/CommandObjectProcess.cpp

@@ -264,9 +264,6 @@ class CommandObjectProcessLaunch : public CommandObjectProcessLaunchOrAttach {
         // PushProcessIOHandler().
         process_sp->SyncIOHandler(0, std::chrono::seconds(2));
 
-        llvm::StringRef data = stream.GetString();
-        if (!data.empty())
-          result.AppendMessage(data);
         // If we didn't have a local executable, then we wouldn't have had an
         // executable module before launch.
         if (!exe_module_sp)
@@ -282,6 +279,11 @@ class CommandObjectProcessLaunch : public CommandObjectProcessLaunchOrAttach {
               exe_module_sp->GetFileSpec().GetPath().c_str(), archname);
         }
         result.SetStatus(eReturnStatusSuccessFinishResult);
+        // This message will refer to an event that happened after the process
+        // launched.
+        llvm::StringRef data = stream.GetString();
+        if (!data.empty())
+          result.AppendMessage(data);
         result.SetDidChangeProcessState(true);
       } else {
         result.AppendError(

lldb/test/Shell/Breakpoint/jit-loader_jitlink_elf.test

@@ -10,9 +10,9 @@
 
 # CHECK: Breakpoint 1: no locations (pending).
 # CHECK: (lldb) run {{.*}}
+# CHECK: Process {{.*}} launched: {{.*}}
 # CHECK: Process {{.*}} stopped
 # CHECK: JIT(0x{{.*}})`jitbp() at jitbp.cpp:1:15
 # CHECK: -> 1    int jitbp() { return 0; }
 # CHECK:                       ^
 # CHECK:    2    int main() { return jitbp(); }
-# CHECK: Process {{.*}} launched: {{.*}}

lldb/test/Shell/Breakpoint/jit-loader_rtdyld_elf.test

@@ -14,9 +14,9 @@
 
 # CHECK: Breakpoint 1: no locations (pending).
 # CHECK: (lldb) run {{.*}}
+# CHECK: Process {{.*}} launched: {{.*}}
 # CHECK: Process {{.*}} stopped
 # CHECK: JIT(0x{{.*}})`jitbp() at jitbp.cpp:1:15
 # CHECK: -> 1    int jitbp() { return 0; }
 # CHECK:                       ^
 # CHECK:    2    int main() { return jitbp(); }
-# CHECK: Process {{.*}} launched: {{.*}}