* lang.c (flag_hash_synchronization): New global.
	(lang_f_options): Added `hash-synchronization'.
	* lang-options.h: Mention -fhash-synchronization.
	* java-tree.h (flag_hash_synchronization): Declare.
	* expr.c (java_lang_expand_expr): Only push `sync_info' value when
	hash table synchronization is disabled.
	* decl.c (init_decl_processing): Only push `sync_info' value when
	hash table synchronization is disabled.
	* class.c (make_class_data): Only push `sync_info' field when hash
	table synchronization is disabled.  Removed dead code.

From-SVN: r32593