Add lib32z1 to install-build-deps-android.sh

This CL removes the instructions to install lib32z1 from
android_build-instructions.md, and instead adds lib32z1 to
install-build-deps-android.sh.  This package is available in
the default repos in all versions of Ubuntu and Debian.

BUG=670518
R=dpranke@chromium.org

Review-Url: https://codereview.chromium.org/2547253002
Cr-Original-Commit-Position: refs/heads/master@{#437201}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 98888af6ae9dbce030da5e37d694f513533fe1a6

install-build-deps-android.sh

@@ -55,7 +55,7 @@ sudo apt-get -f install
 # be installed manually on late-model versions.
 
 # common
-sudo apt-get -y install lighttpd python-pexpect xvfb x11-utils
+sudo apt-get -y install lib32z1 lighttpd python-pexpect xvfb x11-utils
 
 # Some binaries in the Android SDK require 32-bit libraries on the host.
 # See https://developer.android.com/sdk/installing/index.html?pkg=tools