Makefile.in (common_tools): Fix typos in $(exeext) extension.

gcc/ada/
	* Makefile.in (common_tools): Fix typos in $(exeext) extension.
	* gnat_ugn.texi (Style Checking)
	(Adding the Results of Compiler Checks to gnatcheck Output)
	(Example of Binder Output File): Fix typos.
	* ali.ads, einfo.ads, exp_ch4.adb, exp_ch6.adb,
	exp_dbug.ads, exp_dist.adb, exp_smem.adb, g-socket.ads,
	s-osinte-rtems.ads, s-shasto.ads, s-stausa.adb,
	s-stausa.ads, sem_cat.adb, sem_ch12.adb, sem_ch3.adb,
	sem_ch4.adb, sem_ch6.adb, sem_ch8.adb, sem_util.ads,
	sinfo.ads, utils.c: Fix typos in comments.
	* sem_ch6.adb, vms_data.ads: Fix typos in strings.

From-SVN: r136329