efl: Disable examples by default

These are typically not required for an end-user unless they are
coding something, in which case if they want the examples they can
pass a build option for that

meson_options.txt

@@ -96,7 +96,7 @@ option('debug-threads',
 
 option('build-examples',
   type : 'boolean',
-  value : true,
+  value : false,
   description : 'Compile examples'
 )