buildroot

ncurses: use foreach make loops instead of shell for loops

The main benefit of using make foreach loops is that they will abort
if one of the iteration of the loop fails. The current for loops will
continue, and only report a failure if the last iteration was a
failure, but will silently ignore other errors.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Matt Weber <matthew.weber@rockwellcollins.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>