Fix build with missing qml-root-path

Commit 42d0089d44 added support
for multiple root paths. This works fine but it also added
"options->inputFileName" as fallback if nothing was provided.

The inputFileName cannot be used as root path (directory).
So let's use absolutePath() of that file.

Pick-to: 6.4 6.3 6.2
Change-Id: Id76a2cd79a82966bdac8240644b3c03ac4248066
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>

src/tools/androiddeployqt/main.cpp

@@ -1071,7 +1071,7 @@ bool readInputFile(Options *options)
                     options->rootPaths.push_back(path.toString());
             }
         } else {
-            options->rootPaths.push_back(options->inputFileName);
+            options->rootPaths.push_back(QFileInfo(options->inputFileName).absolutePath());
         }
     }