Add a minimal unit test for wxSimplebook.

This is just a test running the common wxBookCtrlBase tests for wxSimplebook.

See #15188.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74277 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/test_vc8_test_gui.vcproj

@@ -713,6 +713,10 @@
 				RelativePath=".\misc\settings.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\controls\simplebooktest.cpp"
+				>
+			</File>
 			<File
 				RelativePath=".\geometry\size.cpp"
 				>