Refactor lazy JNI registration support.

Refactor lazy JNI registration support.

Rename the "linker_script_copy" target to "android_exports" and move the
link_settings clause to that target. This avoids the linker flag being
duplicated once for every target which includes jni_generator.gypi,
which causes problems on some linker versions.

BUG=402003
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=289941

[mkosiba (inactive), 2014-08-15 14:20:39]

lgtm

[Torne, 2014-08-15 14:21:39]

The CQ bit was checked by torne@chromium.org

[commit-bot: I haz the power, 2014-08-15 14:27:19]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/torne@chromium.org/473173004/1

[rmcilroy, 2014-08-15 14:31:30]

On 2014/08/15 14:27:19, I haz the power (commit-bot) wrote:
> CQ is trying da patch. Follow status at
>  https://chromium-status.appspot.com/cq/torne@chromium.org/473173004/1

nice, lgtm.

[rmcilroy, 2014-08-15 14:31:32]

On 2014/08/15 14:27:19, I haz the power (commit-bot) wrote:
> CQ is trying da patch. Follow status at
>  https://chromium-status.appspot.com/cq/torne@chromium.org/473173004/1

nice, lgtm.

[commit-bot: I haz the power, 2014-08-15 18:19:07]

Committed patchset #1 (1) as 289941