Utils: Rename QtcProcess::Result::Finished to FinishedWithSuccess

To make clear that this is not just any finish.

Also change FinishedError to FinishedWithError, to create
symmetry.

Also adapt enum member description to reality.

Change-Id: I13e05391eb86fdb24e2ae660f14dfddb282e1104
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/debugger/debuggeritemmanager.cpp

@@ -747,7 +747,7 @@ void DebuggerItemManagerPrivate::autoDetectGdbOrLldbDebuggers()
         proc.setTimeoutS(2);
         proc.setCommand({"xcrun", {"--find", "lldb"}});
         proc.runBlocking();
-        if (proc.result() == QtcProcess::Finished) {
+        if (proc.result() == QtcProcess::FinishedWithSuccess) {
             QString lPath = proc.allOutput().trimmed();
             if (!lPath.isEmpty()) {
                 const QFileInfo fi(lPath);