Currently busybox utils like "ls" fail to display filenames containing UTF-8
characters, replacing any special characters with "?".
Change libbb's printable_string() function to allow high ASCII characters so
that unicode filenames are displayed correctls.
Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>
Backport of r43084
git-svn-id: svn://svn.openwrt.org/openwrt/branches/barrier_breaker@43085 3c298f89-4303-0410-b956-a3cf2f4a3e73
jow