Add missing pragma Inline for classification attributes

This also moves other pragmas to their corresponding section.

gcc/ada/
	* einfo-utils.ads (Classification Attributes): Add pragma Inline.
	(Synthesized Attribute Functions): Move pragma Inline around.
	(Type Representation Attribute Predicates): Likewise.
	(Field Initialization Routines): Likewise.
	(Miscellaneous Subprogram): Likewise.