sem_ch10.adb, [...]: Fix comment typos.

sem_ch10.adb, [...]: Fix comment typos.

gcc/ada/
	* sem_ch10.adb, sem_ch10.ads,
	sem_ch12.adb, sem_ch12.ads, sem_ch13.adb, sem_ch13.ads,
	sem_ch3.adb, sem_ch4.adb, sem_ch5.adb, sem_ch6.adb,
	sem_ch6.ads, sem_ch8.adb, sem_ch8.ads, sem_ch9.adb,
	sem_elab.adb, sem_elab.ads, sem_elim.ads, sem_eval.adb,
	sem_eval.ads, sem_intr.adb, sem_mech.adb, sem_mech.ads,
	sem_prag.adb, sem_prag.ads, sem_res.adb, sem_res.ads,
	sem_type.adb, sem_util.adb, sem_util.ads, sem_warn.adb,
	sem_warn.ads: Fix comment typos.

From-SVN: r134242