* java/net/PlainDatagramSocketImpl.java

	* java/net/PlainDatagramSocketImpl.java
	(close): Use native implementation.
	(finalize): New method.

	* java/net/PlainSocketImpl.java (finalize): New method.

	* java/net/natPlainDatagramSocketImpl.cc
	(java/io/FileDescriptor.h): Don't include.
	(close): Implement method here.
	(create): Don't assign fd.

	* java/net/natPlainSocketImpl.cc
	(java/io/FileDescriptor.h): Don't include.
	(create): Don't assign fd.
	(accept): Likewise.
	(close): Synchronize.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@51492 138bc75d-0d04-0410-961f-82ee72b054a4