ARM64: Enable PIE on Android.

ARM64: Enable PIE on Android.

BUG=373219
LOG=N
R=rmcilroy@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=21312

[ulan, 2014-05-14 13:10:54]

PTAL

[rmcilroy, 2014-05-14 14:00:33]

lgtm other than nits.  Thanks Ulan

https://codereview.chromium.org/287893002/diff/20001/build/android.gypi
File build/android.gypi (right):

https://codereview.chromium.org/287893002/diff/20001/build/android.gypi#newco...
build/android.gypi:218: ['target_arch=="arm64"', {
 or 'target_arch'=="x86_64"

https://codereview.chromium.org/287893002/diff/20001/build/android.gypi#newco...
build/android.gypi:219: # TODO(ulan): Enable PIE for other architectures.
nit - you might want to point to crbug.com/373219 here to identify why we aren't
doing this yet.

[ulan, 2014-05-14 14:05:23]

https://codereview.chromium.org/287893002/diff/20001/build/android.gypi
File build/android.gypi (right):

https://codereview.chromium.org/287893002/diff/20001/build/android.gypi#newco...
build/android.gypi:218: ['target_arch=="arm64"', {
On 2014/05/14 14:00:33, rmcilroy wrote:
>  or 'target_arch'=="x86_64"

Added "x64" to be consistent with other conditions in this file.

android_x64 and android_x68_x64 are not supported in Makefile.android at the
moment.

https://codereview.chromium.org/287893002/diff/20001/build/android.gypi#newco...
build/android.gypi:219: # TODO(ulan): Enable PIE for other architectures.
On 2014/05/14 14:00:33, rmcilroy wrote:
> nit - you might want to point to crbug.com/373219 here to identify why we
aren't
> doing this yet.

Done.

[ulan, 2014-05-14 14:12:00]

Committed patchset #2 manually as r21312 (presubmit successful).