inline.adb (Build_Body_To_Inline): Issue more precise messages for declarations that prevent inlining.

2014-07-30  Yannick Moy  <moy@adacore.com>

	* inline.adb (Build_Body_To_Inline): Issue more precise messages
	for declarations that prevent inlining.
	(Cannot_Inline): Change usual start of message to refer to contextual
	analysis in GNATprove mode.
	* sem_res.adb (Resolve_Call): Change usual start of message to
	refer to contextual analysis in GNATprove mode, when inlining
	not possible.

From-SVN: r213273