Do not include empty directories as packages

Author: tjwatson

atomos/src/main/java/org/apache/felix/atomos/impl/base/AtomosBase.java

@@ -1663,9 +1663,11 @@ void addPackages(Bundle b)
                 try
                 {
                     content.getEntries().forEach((s) -> {
-                        if (s.length() > 1 && s.endsWith("/") && s.indexOf('-') < 0)
+                        int sLen = s.length();
+                        int lastSlash = s.lastIndexOf('/');
+                        if (sLen > 1 && s.indexOf('-') < 0 && lastSlash > 0 && lastSlash != sLen - 1)
                         {
-                            String pkg = s.substring(0, s.length() - 1).replace('/', '.');
+                            String pkg = s.substring(0, lastSlash).replace('/', '.');
                             packageToAtomosContent.put(pkg,
                                 (AtomosContentIndexed) atomosContent);
                         }