Fix qmake-warnings in Qt 5.

Use QT += help, designer, clean up Designer include hack.

Change-Id: I630cc7575d541ba4dc6c5cbecd335dbb8167e1c9
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>

src/plugins/designer/designer.pro

@@ -9,11 +9,8 @@ include(designer_dependencies.pri)
 
 INCLUDEPATH += ../../tools/utils
 
-minQtVersion(5, 0, 0) {
-    CONFIG += designer
-#   -- Fixme: Make tools available
-    INCLUDEPATH += $$QMAKE_INCDIR_QT/../../qttools/include
-    QT += printsupport
+greaterThan(QT_MAJOR_VERSION, 4) {
+    QT += printsupport designer
 } else {
     # -- figure out shared dir location
     !exists($$[QT_INSTALL_HEADERS]/QtDesigner/private/qdesigner_integration_p.h) {

src/plugins/help/help.pro

@@ -3,8 +3,10 @@ TARGET = Help
 
 QT += network
 greaterThan(QT_MAJOR_VERSION, 4) {
-    QT += printsupport
+    QT += printsupport help
     DEFINES += QT_NO_WEBKIT
+} else {
+   CONFIG += help
 }
 
 INCLUDEPATH += $$PWD
@@ -12,7 +14,6 @@ INCLUDEPATH += $$PWD
 include(../../qtcreatorplugin.pri)
 include(help_dependencies.pri)
 
-CONFIG += help
 DEFINES += QT_CLUCENE_SUPPORT HELP_LIBRARY
 
 HEADERS += \