Update gold README.chromium to match install-build-deps.sh.

README.chromium

Index: README.chromium
===================================================================
--- README.chromium	(revision 120423)
+++ README.chromium	(working copy)
@@ -4,9 +4,14 @@
 
 Description:
 This directory contains a binary of the gold linker from GNU binutils.
-It was built from binutils-2.21.1 on 64-bit Ubuntu Lucid with configure as:
-  ./configure --enable-gold=default --enable-threads
+It was built from binutils-2.21.1 on 64-bit Ubuntu Lucid as follows:
 
+1) Fetch tarball: http://ftp.gnu.org/gnu/binutils/binutils-2.21.1.tar.bz2
+2) Unpack, then
+    ./configure --enable-gold=default --enable-threads
+3) make; strip gold/ld-new

[Lei Zhang, 2012/02/04 01:12:24]

You only need to make the maybe-all-gold target. Building all of binutils can
take a while.

+4) mv gold/ld-new path/to/this/dir/gold64
+
 (ld.bfd is a forwarding script that is in place because the NaCl build
 depends on there being a script with that name in the same directory as
 ld.)