More edits to the linux build instructions.

docs/android_build_instructions.md

 # Checking out and building Chromium for Android
 
 There are instructions for other platforms linked from the 
 [get the code](get_the_code.md) page.
 
 ## Instructions for Google Employees
 
 Are you a Google employee? See
 [go/building-chrome](https://goto.google.com/building-chrome) instead.
 Google employee? See [go/building-chrome](https://goto.google.com/building-chrome) instead.
@@ skipping 80 matching lines @@
 Once you have checked out the code, run
 
 ```shell
 $ build/install-build-deps-android.sh
 ```
 
 to get all of the dependencies you need to build on Linux, *plus* all of the
 Android-specific dependencies (you need some of the regular Linux dependencies
 because an Android build includes a bunch of the Linux tools and utilities).
 
+*** aside
+If you're running Debian, you'll also need to install the package `lib32z1`.

[Tom (Use chromium acct), 2016/12/02 01:42:38]

Why don't we just add lib32z1 to install-build-deps-android.sh?

[Dirk Pranke, 2016/12/02 01:56:45]

Good question. I don't know? Can you find out?

[Tom (Use chromium acct), 2016/12/02 02:09:45]

Ok, I'll see if I can fix this in a follow-up patch.

+***
+
 ### Run the hooks
 
 Once you've run `install-build-deps` at least once, you can now run the
 Chromium-specific hooks, which will download additional binaries and other
 things you might need:
 
 ```shell
 $ gclient runhooks
 ```
 
@@ skipping 244 matching lines @@
 release of Chrome for Android (v25+) you can do the following steps.
 Note that in order to get your changes into the official release, you'll
 need to send your change for a codereview using the regular process for
 committing code to chromium.
 
 1.  Open Chrome on your Android device and visit chrome://version
 2.  Copy down the id listed next to "Build ID:"
 3.  Go to
     [http://storage.googleapis.com/chrome-browser-components/BUILD\_ID\_FROM\_STEP\_2/index.html](http://storage.googleapis.com/chrome-browser-components/BUILD_ID_FROM_STEP_2/index.html)
 4.  Download the listed files and follow the steps in the README.