2017-06-19  Martin Liska  <mliska@suse.cz>

	* doc/install.texi: Document that PGO runs in 4 stages.
2017-06-19  Martin Liska  <mliska@suse.cz>

	* Makefile.def: Define 4 stages PGO bootstrap.
	* Makefile.tpl: Define FLAGS.
	* Makefile.in: Regenerate.

From-SVN: r249366