einfo.adb (Get_Pragma): Handle the retrieval of delayed pragmas stored in N_Contract...

einfo.adb (Get_Pragma): Handle the retrieval of delayed pragmas stored in N_Contract nodes.

2013-07-08  Hristian Kirtchev  <kirtchev@adacore.com>

	* einfo.adb (Get_Pragma): Handle the retrieval of delayed
	pragmas stored in N_Contract nodes.
	* einfo.ads (Get_Pragma): Update the comment on usage.
	* sem_prag.adb (Check_Precondition_Postcondition): Retain a copy
	of the pragma when it applies to a body that acts as a spec. The
	copy is preanalyzed and chained on the contract of the body.

From-SVN: r200774