Added wxAbort() which can also be used under Windows CE.

Windows CE doesn't have abort() so provide a wrapper which can be used even
there (see #13847).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70311 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/debug.h

@@ -9,6 +9,17 @@
 /** @addtogroup group_funcmacro_debug */
 //@{
 
+/**
+    Exits the program immediately.
+
+    This is a simple wrapper for the standard abort() function which is not
+    available under all platforms (currently only Windows CE doesn't provide
+    it).
+
+    @since 2.9.4
+ */
+void wxAbort();
+
 /**
     @def wxDEBUG_LEVEL