Move examples into separate quick/controls directory

This makes sure all examples are in a separate directory for the
Qt source packages. It also is in line with how the other repositories
are structured.

Task-number: QTBUG-30886
Change-Id: Idc2856e5dfaf467c8cb9764aee327a3b20c7b2d0
Reviewed-by: Caroline Chao <caroline.chao@digia.com>

.gitignore

 # This file is used to ignore files which are generated in the Qt build system
 # ----------------------------------------------------------------------------
 
-examples/ApplicationTemplate/application
-examples/text/text
+examples/quick/controls/ApplicationTemplate/application
+examples/quick/controls/text/text
 tests/auto/activeFocusOnTab/tst_activeFocusOnTab
 tests/auto/controls/tst_controls
 tests/auto/qtdesktop/tst_qtdesktop

examples/examples.pro

 TEMPLATE = subdirs
 
-SUBDIRS += \
-    gallery \
-    splitview \
-    stackview \
-    tableview \
-    touch
-
-qtHaveModule(widgets) {
-    SUBDIRS += text \
-        ApplicationTemplate
-}
+SUBDIRS += quick/controls

examples/quick/controls/controls.pro

+TEMPLATE = subdirs
+
+SUBDIRS += \
+    gallery \
+    splitview \
+    stackview \
+    tableview \
+    touch
+
+qtHaveModule(widgets) {
+    SUBDIRS += text \
+        ApplicationTemplate
+}