Enable building for android on x86_64 machines.

Enable building for android on x86_64 machines.

R=ulan@chromium.org
BUG=

Committed: https://code.google.com/p/v8/source/detail?r=15702

[rmcilroy_google, 2013-07-12 14:50:32]

Sorry, sent you one via the appspot rievelt server accidently (which I've just
deleted).  Please ignore that one and use this one instead (assuming I've done
it right here...)

[rmcilroy, 2013-07-16 08:48:36]

ping?

[ulan, 2013-07-16 09:04:14]

Sorry for the delay.

https://codereview.chromium.org/18535011/diff/1/Makefile.android
File Makefile.android (right):

https://codereview.chromium.org/18535011/diff/1/Makefile.android#newcode39
Makefile.android:39: HOST_ARCH = $(shell uname -m | \
This doesn't work with previous versions of Android NDK (pre r8e), which  had
only x86. For example, I have x86_64 machine, but the host arch is linux-x86
(android-ndk-r8d). Maybe it is better to allow the user to enable x86_64 via
parameter like we allow to specify ${ANDROID_NDK_ROOT}?

[rmcilroy, 2013-07-16 16:44:28]

https://codereview.chromium.org/18535011/diff/1/Makefile.android
File Makefile.android (right):

https://codereview.chromium.org/18535011/diff/1/Makefile.android#newcode39
Makefile.android:39: HOST_ARCH = $(shell uname -m | \
On 2013/07/16 09:04:14, ulan wrote:
> This doesn't work with previous versions of Android NDK (pre r8e), which  had
> only x86. For example, I have x86_64 machine, but the host arch is linux-x86
> (android-ndk-r8d). Maybe it is better to allow the user to enable x86_64 via
> parameter like we allow to specify ${ANDROID_NDK_ROOT}?

How about this?  It defaults this variable based on the host's arch, but it can
be override if required by setting ANDROID_NDK_HOST_ARCH.

[ulan, 2013-07-17 07:59:28]

LGTM, I will land it for you.

[ulan, 2013-07-17 08:37:53]

Committed patchset #2 manually as r15702 (presubmit successful).