busybox: make high ASCII chars printable (#7993)

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>

SVN-Revision: 43084

package/utils/busybox/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=busybox
 PKG_VERSION:=1.22.1
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 PKG_FLAGS:=essential
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2

package/utils/busybox/patches/270-libbb_make_unicode_printable.patch

@@ -0,0 +1,20 @@
+--- a/libbb/printable_string.c
++++ b/libbb/printable_string.c
+@@ -31,8 +31,6 @@ const char* FAST_FUNC printable_string(u
+ 		}
+ 		if (c < ' ')
+ 			break;
+-		if (c >= 0x7f)
+-			break;
+ 		s++;
+ 	}
+ 
+@@ -45,7 +43,7 @@ const char* FAST_FUNC printable_string(u
+ 			unsigned char c = *d;
+ 			if (c == '\0')
+ 				break;
+-			if (c < ' ' || c >= 0x7f)
++			if (c < ' ')
+ 				*d = '?';
+ 			d++;
+ 		}