- Avoid autoconf on older products
- Apply audit patch variant to readline as well as we use a shared
libreadline
- Avoid bash-devel on older products as older GNU make do not have
a realpath builtin

- Do not trigger the export of COLUMNS or LINES due enforced
checkwinsize (bnc#793536)

- Update bash 4.2 to patch level 42
* Missing I/O errors if output redirection applied to builtin
commands when the file descriptor was closed
* Process substitution incorrectly inherited a flag that
inhibited using the temporary environment for variable lookups
if it was providing the filename to a redirection.
* Compilation failed after specifying the `minimal config' option