sun.security.util.ManifestEntryVerifier: copy from jdk8u60

Changed upstream to use java.util.Base64 instead of
sun.misc.BASE64Decoder.

This doesn't change any observable behaviour, I checked that
the code modified is exercised by JarFileTest, that checks
manifests against known answers.

Bug: 29631070
Test: vogar JarFileTest
Change-Id: I61c59a9f707d79dd1f93e6342c5bebb07b256403
1 file changed