Add line returns in RTL dump file

[Eric Botcazou]

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


2019-08-01  Eric Botcazou  <ebotcazou@adacore.com>

	* cfgrtl.c (relink_block_chain): Add line returns in dump file.

-- 
Eric Botcazou
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