codecvt.xml: Fix reference to Austin Common Standards Revision Group.

	* doc/xml/manual/codecvt.xml: Fix reference to Austin Common
	Standards Revision Group.
	* doc/xml/manual/messages.xml: Ditto.
	* doc/xml/manual/using_exceptions.xml: Ditto.

	* doc/xml/manual/messages.xml: Fix reference to GNU gettext.

	* doc/xml/manual/policy_data_structures.xml: Fix reference to
	STL at SGI.
	Update reference to COM at Microsoft.
	Update reference to Worst-case efficient priority queues at ACM.

From-SVN: r193084