Fix header.

gcc/ada/g-md5.adb

gcc/ada/g-md5.ads

gcc/ada/g-sha1.adb

gcc/ada/g-sha1.ads

gcc/ada/g-sha224.ads

gcc/ada/g-sha256.ads

gcc/ada/g-sha384.ads

gcc/ada/g-sha512.ads

gcc/ada/s-sechas.adb

gcc/ada/s-sechas.ads

gcc/ada/s-sehamd.adb

gcc/ada/s-sehamd.ads

gcc/ada/s-sehash.adb

gcc/ada/s-sehash.ads

gcc/ada/s-shsh32.adb

gcc/ada/s-shsh32.ads

gcc/ada/s-shsh64.adb

gcc/ada/s-shsh64.ads

gcc/ada/s-shshco.adb

gcc/ada/s-shshco.ads