Make breakpad compatible with Android NDK r10d.

Make breakpad compatible with Android NDK r10d.

r1397 did introduce a workaround to deal with a typo in sys/user.h
in the Android NDK. The typo has been fixed in [1]. However, breakpad
cannot just switch to the fixed version as this would require atomic
rolls of Breakpad and NDK in chromium, which would make reverts hard
to handle.
This change introduces an inelegant yet functional hack which makes
breakpad compatible with both versions of the NDK, with and without
the typo. It can be reverted once Chrome has stably rolled to NDK
r10d.

[1] https://android.googlesource.com/platform/bionic/+/f485547b

BUG=breakpad:642
R=fdegans@chromium.org, rmcilroy@chromium.org

Committed: https://code.google.com/p/google-breakpad/source/detail?r=1433

[fdegans]

lgtm
That will prevent us from having to do a 3-way roll again.

[rmcilroy]

On 2015/03/10 16:38:46, fdegans wrote:
> lgtm
> That will prevent us from having to do a 3-way roll again.

Eww, but yeah, this is probably the safest way to do the roll.  Please remove
the hack once r10d has rolled and is stable in Chrome.

lgtm.

[primiano]

Committed patchset #1 (id:1) manually as 1433 (presubmit successful).