Doc: Add Squish test to example docs

Adds mentions of Squish tests for Coffee Machine
and Calqlatr example.

Task-number: QTBUG-138433
Task-number: QTBUG-138434
Pick-to: 6.10
Change-Id: I42edab9297490c71f50bc9e1f9413e95c02d0c5b
Reviewed-by: Konsta Alajärvi <konsta.alajarvi@qt.io>
Reviewed-by: Nicholas Bennett <nicholas.bennett@qt.io>
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>

doc/src/squish-tested-example.qdocinc

@@ -0,0 +1,18 @@
+    \section1 Squish GUI testing
+
+    This application comes with \l {https://doc.qt.io/squish/index.html}
+    {Squish GUI tests} targeted for \Q4A. The tests are made with
+    \l {https://doc.qt.io/squish/installing-squish-for-qt.html#ins-squish-for-qt}
+    {Squish for Qt} and are written in Python and can be found under the
+    application test directory.
+
+    When using Squish for \Q4A, make sure to use the
+    \l {https://doc.qt.io/squish/squish-s-c-api.html#using-the-qt-built-in-hook}{Qt built-in hook}
+    and \l {https://doc.qt.io/squish/installing-squish-for-qt-for-android-testing.html}{forward Squish port}
+    with adb.
+    If you are getting the error "Cannot load library" with \c dlopen failing, disable
+    \c QT_USE_TARGET_ANDROID_BUILD_DIR from CMake configuration, or clear it from
+    \uicontrol {Projects->Build Settings->CMake->Current Configuration} in \QC.
+
+    If you don't have a Squish license, you can get a
+    \l{https://www.qt.io/quality-assurance/squish-free-trial}{free trial}.

examples/demos/calqlatr/doc/src/calqlatr.qdoc

@@ -183,5 +183,7 @@
 
     \section1 Source files
 
+    \include squish-tested-example.qdocinc
+
     \sa {QML Applications}
 */

examples/demos/coffee/doc/src/coffee.qdoc

@@ -241,5 +241,8 @@
     \section1 Source files
 
     \sa {Qt Quick Examples and Tutorials} {All Qt Examples}
+
+    \include squish-tested-example.qdocinc
+
 */