Fix missing bin include of test bundle content

Fix #786

Author: laeubi

org.eclipse.jdt.debug.tests/build.properties

@@ -28,7 +28,8 @@ bin.includes = plugin.xml,\
                java16_/,\
                java23/,\
                java24/,\
-               java25/
+               java25/,\
+               multirelease/
 source.javadebugtests.jar = test plugin/,\
                             tests/,\
                             console tests/