Changed the include statement of 'readline.h', so it can be found on multiple...

Changed the include statement of 'readline.h', so it can be found on multiple platforms (Bug 565893)

Signed-off-by: Botond Baranyi <botond.baranyi@ericsson.com>
Change-Id: Iaa1f9153cfdceb40c74e01ec30a756a63d0caa52