ncurses: reinstall l/linux terminfo file

This file was installed prior to the refactoring done in commit
33ba5188351ece027455e460f6cba4245af49f3a ("ncurses: factorize terminfo
files installation").

Reported-by: Benoît Allard <benoit.allard@greenbone.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/ncurses/ncurses.mk

@@ -57,6 +57,7 @@ NCURSES_LIBS-$(BR2_PACKAGE_NCURSES_TARGET_FORM) += form
 
 NCURSES_TERMINFO_FILES = \
 	a/ansi \
+	l/linux \
 	p/putty \
 	p/putty-vt100 \
 	s/screen \