[Ada] Fix back-and-forth issue in debugger

[Eric Botcazou]

This is a small regression present on the mainline: under some circumstances, 
the debugger may go back and forth when stepping over a call, if the arguments 
contain string concatenations.

Tested on x86_64-suse-linux, applied on the mainline.


2017-02-24  Eric Botcazou  <ebotcazou@adacore.com>

	* gcc-interface/trans.c (Handled_Sequence_Of_Statements_to_gnu): If
	there is no end label, put the location of the At_End procedure on
	the call to the procedure.

-- 
Eric Botcazo
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