autogen.sh script update required handle \n

[rakeshgmtke]

autogen.sh script can insert a new line with echo above 8.30.

It's updated in latest echo version.

/bin/echo --version
echo (GNU coreutils) 8.30
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later https://gnu.org/licenses/gpl.html.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Brian Fox and Chet Ramey.

echo -e

https://unix.stackexchange.com/questions/189787/difference-between-echo-and-echo-e

from echo manual pages

   If -e is in effect, the following sequences are recognized:

   \\     backslash

   \a     alert (BEL)

   \b     backspace

   \c     produce no further output

   \e     escape

   \f     form feed

   \n     new line

   \r     carriage return

   \t     horizontal tab

   \v     vertical tab

   \0NNN  byte with octal value NNN (1 to 3 digits)

   \xHH   byte with hexadecimal value HH (1 to 2 digits)

   NOTE: your shell may have its own version of echo, which usually supersedes the version described here.  Please refer to your shell's documentation for details about the options
   it supports.