[Ada] Minor reformattings

[Ada] Minor reformattings

2018-08-21  Hristian Kirtchev  <kirtchev@adacore.com>

gcc/ada/

	* checks.adb, contracts.adb, exp_aggr.adb, exp_attr.adb,
	exp_ch6.adb, exp_ch7.adb, exp_ch9.adb, exp_unst.adb,
	exp_util.adb, freeze.adb, gnatlink.adb, layout.adb,
	lib-writ.adb, lib-xref-spark_specific.adb, sem_ch13.adb,
	sem_ch3.adb, sem_ch6.adb, sem_res.adb, sem_util.adb, sinfo.ads,
	sprint.adb: Minor reformatting.

From-SVN: r263737