Add more information to appdata xml

- Add oars content rating to appdata xml
- Add screenshots to appdata xml
- Add release info

Change-Id: I61bf023814149983f7a64e03f49eb8d998dac85b
Reviewed-by: Youri Westerman <tetracon@gmail.com>
Reviewed-by: Cristian Adam <cristian.adam@qt.io>

share/share.pro

@@ -1,6 +1,23 @@
 TEMPLATE = subdirs
 SUBDIRS = qtcreator/static.pro
 
+include(../qtcreator.pri)
+
+linux {
+    appdata = $$cat($$PWD/metainfo/org.qt-project.qtcreator.appdata.xml.cmakein, blob)
+    appdata = $$replace(appdata, \\$\\{IDE_VERSION_DISPLAY\\}, $$QTCREATOR_DISPLAY_VERSION)
+    appdata = $$replace(appdata, \\$\\{DATE_ATTRIBUTE\\}, "")
+    write_file($$OUT_PWD/metainfo/org.qt-project.qtcreator.appdata.xml, appdata)
+
+    appstream.files = $$OUT_PWD/metainfo/org.qt-project.qtcreator.appdata.xml
+    appstream.path = $$QTC_PREFIX/share/metainfo/
+
+    desktop.files = share/applications/org.qt-project.qtcreator.desktop
+    desktop.path = $$QTC_PREFIX/share/applications/
+
+    INSTALLS += appstream desktop
+}
+
 defineTest(hasLupdate) {
     cmd = $$eval(QT_TOOL.lupdate.binary)
     isEmpty(cmd) {