Use ANSI C comments in org_gnu_readline_Readline.c
Use ANSI C comments in org_gnu_readline_Readline.c

All other code uses ANSI C style. For consistency, use ANSI C comments
here too.

aclemons/java-readline,creechy/java-readline,aclemons/java-readline,creechy/java-readline,creechy/java-readline,aclemons/java-readline,aclemons/java-readline