base-files: supress errors from ldd

ldd might be called for shell scrips during sysupgrade, causing it to
complain that they are not a dynamic executables.

This is a harmless error, so supress it to avoid confusing about them
being serious ones.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 43315

package/base-files/files/lib/upgrade/common.sh

@@ -3,7 +3,7 @@
 RAM_ROOT=/tmp/root
 
 [ -x /usr/bin/ldd ] || ldd() { LD_TRACE_LOADED_OBJECTS=1 $*; }
-libs() { ldd $* | sed -r 's/(.* => )?(.*) .*/\2/'; }
+libs() { ldd $* 2>/dev/null | sed -r 's/(.* => )?(.*) .*/\2/'; }
 
 install_file() { # <file> [ <file> ... ]
 	for file in "$@"; do