Doc: Replace links to gitorious

Gitorious is closing down, so set links to qt.io sites.

Change-Id: If8c2576f1015066266b8a308f42e902020ab188c
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@theqtcompany.com>

doc/src/howto/qtcreator-faq.qdoc

@@ -290,7 +290,7 @@
 
     If it is a scheduled feature, you can see this in the task tracker. If a
     feature already has been implemented, it is mentioned in the
-    \l{http://qt.gitorious.org/qt-creator/qt-creator/trees/master/dist}{changes file}
+    \l{https://code.qt.io/cgit/qt-creator/qt-creator.git/tree/dist}{changes file}
     for the upcoming release.
 
     \b {Why does \QC not use tabs for editors?}

doc/src/overview/creator-acknowledgements.qdoc

@@ -90,7 +90,7 @@
         here:
         \list
         \li  QtCreator/src/libs/3rdparty
-        \li  \l{http://qt.gitorious.org/qt-creator/qt-creator/trees/master/src/libs/3rdparty}
+        \li  \l{https://code.qt.io/cgit/qt-creator/qt-creator.git/tree/src/libs/3rdparty}
         \endlist
 
         \li \b{ANGLE (Windows)}

doc/src/qtquick/qtquick-exporting-qml.qdoc

@@ -115,8 +115,8 @@
     \list 1
 
         \li Download the export script, \e{Export QML.jx}, from
-            \l{http://qt.gitorious.org/qt-labs/photoshop-qmlexporter/trees/master}
+            \l{https://code.qt.io/cgit/qt-labs/photoshop-qmlexporter.git/}
-            {Gitorious}.
+            {code.qt.io}.
 
             \note Read the README.txt file in the repository for latest
             information about the script.
@@ -173,8 +173,8 @@
             {Tutorial: Installing Python for GIMP 2.6 (Windows)}.
 
         \li Download the export script, \e qmlexporter.py, from
-            \l{http://qt.gitorious.org/qt-labs/gimp-qmlexporter/trees/master}
+            \l{https://code.qt.io/cgit/qt-labs/gimp-qmlexporter.git/}
-            {Gitorious}.
+            {code.qt.io}.
 
             \note Read the INSTALL.txt in the repository for latest information
             about the script.