[Ada] Do not freeze profiles for dispatch tables

[Ada] Do not freeze profiles for dispatch tables

When static dispatch tables are built for library-level tagged types, the
primitives (the subprogram themselves) are frozen; that's necessary because
their address is taken.  However, their profile, i.e. all the types present
therein, is also frozen, which is not necessary after AI05-019 and is also
inconsistent with the handling of attribute references.

The change also removes a couple of pragma Inline on subprograms that are
too large for inlining to bring any benefit.

gcc/ada/

	* exp_ch3.adb (Expand_N_Object_Declaration): Adjust call to Make_DT.
	* exp_disp.ads (Building_Static_DT): Remove pragma Inline.
	(Building_Static_Secondary_DT): Likewise.
	(Convert_Tag_To_Interface): Likewise.
	(Make_DT): Remove second parameter.
	* exp_disp.adb (Make_DT): Likewise.
	(Check_Premature_Freezing): Delete.
	Pass Do_Freeze_Profile as False in call to Freeze_Entity.
	* freeze.ads (Freezing_Library_Level_Tagged_Type): Delete.
	* freeze.adb (Freeze_Profile): Remove obsolete code.
	(Freeze_Entity): Tweak comment.