Clean up warnings in javax.xml.crypto.

This package uses a lot of raw types in its APIs; these warnings will need to be suppress as we cannot easily change the API. Some internal implementation can be generified however.

This package is built by the make/javax/others/Makefile build step and is built along with several other packages. Most of these are warning-free with the exception of javax.script which has a warning, so I'll fix that one too.