ncurses: use closing curly brackets in FILES_${PN}-tools variable

ncurses: use closing curly brackets in FILES_${PN}-tools variable

This patch removes a workaround (needed for bitbake python parser) where
closing curly brackets were replaced by ascii code '\x7d'.

This commit requires a bitbake version with the
"data_smart: simple bracket matching inside python expressions" patch
applied.

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>