Fix compilation warning.

Fix compilation warning:
" destination for this 'memcpy' call is a pointer to dynamic class
'CentralDirEntry'; vtable pointer will be overwritten"
by removing unnecessary virtual desctructor.

Bug: 27695718
Change-Id: Id3c451f82374f2232176115b7bc3291ac4275c00
diff --git a/tools/zipalign/ZipEntry.h b/tools/zipalign/ZipEntry.h
index 129a759..eb68afe 100644
--- a/tools/zipalign/ZipEntry.h
+++ b/tools/zipalign/ZipEntry.h
@@ -290,7 +290,7 @@
             mExtraField(NULL),
             mFileComment(NULL)
         {}
-        virtual ~CentralDirEntry(void) {
+        ~CentralDirEntry(void) {
             delete[] mFileName;
             delete[] mExtraField;
             delete[] mFileComment;