2014-07-18  Pascal Obry  <obry@adacore.com>

	* a-textio.adb, a-witeio.adb, a-ztexio.adb: Use C_Streams Default_Text.
	* i-cstrea.ads (Content_Encoding): Moved here, add convention C.
	* s-ficobl.ads (Content_Encoding): Moved to C_Streams.
	* s-fileio.adb (Open): Adjust to use Content_Encoding from C_Streams.

From-SVN: r212811