[Linux integration] Install desktop and appstream files

Installs the appstream's appdata file into the correct location and with
the correct name. Fixes the contents to conform to the standard.
Installs a desktop file because it's both required by appstream and by
desktop environments. Note this was currently patched in by
distributions.

Task-number: QTCREATORBUG-17335
Change-Id: If1425ec9fbd0c639550852a8d6e1f15a6b9d77ef
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

dist/org.qt-project.qtcreator.appdata.xml

@@ -1,8 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!-- Copyright (C) 2016 The Qt Company Ltd. Contact: https://www.qt.io/licensing/ -->
-<application>
- <id type="desktop">qtcreator.desktop</id>
- <licence>CC-BY-SA</licence>
+<component type="desktop">
+ <id>org.qt-project.qtcreator.desktop</id>
+ <metadata_license>CC0-1.0</metadata_license>
+ <project_license>GPL-3.0</project_license>
  <description>
   <p>
    Qt Creator provides a cross-platform, complete integrated development
@@ -20,9 +21,7 @@
    newcomers to Qt.
   </p>
  </description>
- <screenshots>
-  <screenshot type="default" width="800" height="600">http://qt-project.org/uploads/image_upload/qtcreator-edit-mode.png</screenshot>
- </screenshots>
- <url type="homepage">https://wiki.qt.io/Category:Tools::QtCreator</url>
+
+ <url type="homepage">https://qt.io/ide/</url>
  <project_group>Qt</project_group>
-</application>
+</component>

dist/org.qt-project.qtcreator.desktop

@@ -0,0 +1,11 @@
+[Desktop Entry]
+Type=Application
+Exec=qtcreator %F
+Name=Qt Creator
+GenericName=C++ IDE for developing Qt applications
+X-KDE-StartupNotify=true
+Icon=QtProject-qtcreator
+Terminal=false
+Categories=Development;IDE;Qt;
+MimeType= text/x-c++src;text/x-c++hdr;text/x-xsrc;application/x-designer;application/vnd.qt.qmakeprofile;application/vnd.qt.xml.resource;
+

qtcreator.pro

@@ -93,6 +93,16 @@ isEmpty(BASENAME): BASENAME = qt-creator-$${PLATFORM}$(INSTALL_EDITION)-$${QTCRE
 macx:INSTALLER_NAME = "qt-creator-$${QTCREATOR_VERSION}"
 else:INSTALLER_NAME = "$${BASENAME}"
 
+linux {
+    appstream.files = dist/org.qt-project.qtcreator.appdata.xml
+    appstream.path = $$QTC_PREFIX/share/metainfo/
+
+    desktop.files = dist/org.qt-project.qtcreator.desktop
+    desktop.path = $$QTC_PREFIX/share/applications/
+
+    INSTALLS += appstream desktop
+}
+
 macx {
     APPBUNDLE = "$$OUT_PWD/bin/Qt Creator.app"
     BINDIST_SOURCE = "$$OUT_PWD/bin/Qt Creator.app"