In mcs:

In mcs:
	Fix #74484.
	* attribute.cs (Attribute.GetAttributeUsage): Resolve
	AttributeUsageAttribute in the emitcontext of the attribute class,
	not in the emitcontext of the attributable entity it was attached to.
	* cs-parser.jay: Use 'current_class', not 'current_container',
	when creating a GlobalAttribute.

In tests:
	* test-361.cs, test-361-2.cs: New test from #74484.

svn path=/trunk/mcs/; revision=42679