David Hendricks 7b43197449 Add library for working with Android ...

This adds a couple of helper functions for working within Android:
- in_android(): Crude test that uses getenv() to see if an Android-
specific environment variable is defined.

- android_tmpdir_path(): Android doesn't have the usual locations for
temporary file storage such as /tmp or even /var/run/locks. And to
make matters worse, there isn't even a standard location for
temporary files so it must be determined at run time.

This will be used in a follow-up patch.

BUG=chrome-os-partner:49527
BRANCH=none
TEST=tested on smaug

Change-Id: Ifb5fb4067fffb7c8cb2d4350ca4a223e884d3aa5
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/329299
Reviewed-by: Shawn N <shawnn@chromium.org>

2016-02-29 18:20:07 -08:00

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