macdeployqt: Also look for app libraries with .so extension

Fixes deploying glib-networking gio modules which uses .so file
extension.

Change-Id: I6b4c4e9c3bb5745ffa33d7e83c5853a9372f1ca6
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
(cherry picked from commit c66dab56b20a47062c74fa6ecf8ea438bdc07b24)

src/tools/macdeployqt/shared/shared.cpp

@@ -435,7 +435,7 @@ QStringList findAppLibraries(const QString &appBundlePath)
 {
     QStringList result;
     // dylibs
-    QDirIterator iter(appBundlePath, QStringList() << QString::fromLatin1("*.dylib"),
+    QDirIterator iter(appBundlePath, QStringList() << QString::fromLatin1("*.dylib") << QString::fromLatin1("*.so"),
             QDir::Files | QDir::NoSymLinks, QDirIterator::Subdirectories);
     while (iter.hasNext()) {
         iter.next();