Proxy.java (generate): Uncomment protection domain code.

Proxy.java (generate): Uncomment protection domain code.

	* java/lang/reflect/Proxy.java (generate): Uncomment protection
	domain code.
	* java/lang/natClassLoader.cc (defineClass): Added `loader'
	argument.
	(linkClass0): Now in VMClassLoader.
	(markClassErrorState0): Likewise.
	(getSystemClassLoaderInternal): New method.
	* java/lang/natClass.cc (initializeClass): Use
	VMClassLoader::resolveClass.
	* java/lang/ClassLoader.java: New version, from Classpath.
	* java/lang/Class.java (getProtectionDomain):
	protectionDomainPermission and unknownProtectionDomain now in
	VMClassLoader.
	* java/lang/Class.h: VMClassLoader now a friend class.
	* gnu/gcj/runtime/VMClassLoader.java (instance): Now
	package-private.
	* gcj/javaprims.h: Regenerated class list.
	* resolve.cc (_Jv_PrepareClass): Use VMClassLoader::resolveClass.
	* java/lang/VMClassLoader.java: New version from Classpath;
	modified for libgcj use.

From-SVN: r71765