qbs files: Enable 'Help' plugin for Qt5

Change-Id: Ib8c7692984eae2d4b9e865837f4ef6970524a87f
Reviewed-by: Joerg Bornemann <joerg.bornemann@nokia.com>

src/plugins/help/help.qbs

@@ -5,15 +5,29 @@ import "../QtcPlugin.qbs" as QtcPlugin
 QtcPlugin {
     name: "Help"
 
-    condition: qtcore.versionMajor === 4
-    Depends { id: qtcore; name: "qt.core" }
-    Depends { name: "qt"; submodules: ['widgets', 'help', 'webkit', 'network'] }
+    Depends { id: qtcore; name: "Qt.core" }
+    Depends {
+        condition: qtcore.versionMajor == 4
+        name: "Qt"; submodules: ["widgets", "help", "webkit", "network"]
+    }
+    Depends {
+        condition: qtcore.versionMajor >= 5
+        name: "Qt"; submodules: ["widgets", "help", "network", "printsupport"]
+    }
+
     Depends { name: "Core" }
     Depends { name: "Find" }
     Depends { name: "Locator" }
 
     Depends { name: "cpp" }
-    cpp.defines: base.concat(["QT_CLUCENE_SUPPORT"])
+    Properties {
+        condition: qtcore.versionMajor >= 5
+        cpp.defines: base.concat(["QT_NO_WEBKIT"])
+    }
+    cpp.defines: base.concat([
+        "QT_CLUCENE_SUPPORT",
+        "HELP_LIBRARY"
+    ])
     cpp.includePaths: [
         "../../shared/help",
         ".",