Update binutils URL and sha1sum for gold sources

The ftp.gnu.org archive got rebuilt and changed some files in place under
the same name but with rebuilt contents. The best binutils source archive
that is now available there is the 2.21.1a file, which has a verified .sig
(GPG signature) file.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/7841002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@99781 0039d316-1c4b-4281-b951-d872f2087c98

build/install-build-deps.sh

@@ -48,7 +48,7 @@ install_gold() {
 
   BINUTILS=binutils-2.21.1
   BINUTILS_URL=http://ftp.gnu.org/gnu/binutils/$BINUTILS.tar.bz2
-  BINUTILS_SHA1=f188490772cc902ec44a76545887bff60dbfa22d
+  BINUTILS_SHA1=525255ca6874b872540c9967a1d26acfbc7c8230
 
   test -f $BINUTILS.tar.bz2 || wget $BINUTILS_URL
   if test "`sha1sum $BINUTILS.tar.bz2|cut -d' ' -f1`" != "$BINUTILS_SHA1"