On OS X (macOS), "make menuconfig" fails with missing
linker symbols. By specifying the "-l" linker options
with the menu, panel and ncurses libraries directly if
the autodetection fails, it builds and links properly.
Note that this might denote a problem with
"check-lxdialog.sh".
Change-Id: Ib2721646cc01c3e977911d8e6d0c8303dcedbc58
Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>