Add 32-bit libreadline to amd64 build deps.

build/install-build-deps.sh

 #!/bin/bash -e
 
 # Script to install everything needed to build chromium (well, ideally, anyway)
 # See http://code.google.com/p/chromium/wiki/LinuxBuildInstructions
 # and http://code.google.com/p/chromium/wiki/LinuxBuild64Bit
 
 if ! egrep -q "Ubuntu 8.04|Ubuntu 8.10" /etc/issue; then
   echo "Only Ubuntu 8.04 and 8.10 are currently supported" >&2
   exit 1
 fi
@@ skipping 25 matching lines @@
 # Debugging symbols for all of the run-time libraries
 dbg_list="libatk1.0-dbg libc6-dbg libcairo2-dbg libfontconfig1-dbg
           libglib2.0-0-dbg libgtk2.0-0-dbg libnspr4-0d-dbg libnss3-1d-dbg
           libpango1.0-0-dbg libpcre3-dbg libpixman-1-0-dbg libx11-6-dbg
           libxau6-dbg libxcb-xlib0-dbg libxcb1-dbg libxcomposite1-dbg
           libxcursor1-dbg libxdamage1-dbg libxdmcp6-dbg libxext6-dbg
           libxfixes3-dbg libxi6-dbg libxinerama1-dbg libxrandr2-dbg
           libxrender1-dbg zlib1g-dbg"
 
 # Standard 32bit compatibility libraries
-cmp_list="ia32-libs lib32stdc++6 lib32z1 lib32z1-dev libc6-dev-i386 libc6-i386"
+cmp_list="ia32-libs lib32readline-dev lib32stdc++6 lib32z1 lib32z1-dev
+          libc6-dev-i386 libc6-i386"
 
 # Waits for the user to press 'Y' or 'N'. Either uppercase of lowercase is
 # accepted. Returns 0 for 'Y' and 1 for 'N'. If an optional parameter has
 # been provided to yes_no(), the function also accepts RETURN as a user input.
 # The parameter specifies the exit code that should be returned in that case.
 # The function will echo the user's selection followed by a newline character.
 # Users can abort the function by pressing CTRL-C. This will call "exit 1".
 yes_no() {
   local c
   while :; do
@@ skipping 180 matching lines @@
              sed -e 's/[.]so[.][0-9].*/.so/' |
              sort -u); do
     [ "x${i##*/}" = "xld-linux.so" ] && continue
     [ -r "$i" ] && continue
     j="$(ls "$i."* | sed -e 's/.*[.]so[.]\([^.]*\)$/\1/;t;d' |
          sort -n | tail -n 1)"
     [ -r "$i.$j" ] || continue
     sudo ln -s "${i##*/}.$j" "$i"
   done
 fi