Switch default float-abi for ARM linux from softfp to hard

Switch default float-abi for ARM linux from softfp to hard

All the ARM linux builders already specify this, and
armhf is the now the default for both Ubuntu and Debian.

Followup cleanup cl for the bots:
https://codereview.chromium.org/1141643004/

BUG=308256
Committed: https://crrev.com/ff8ec298fd273181647ec4d94c032343382dbe57
Cr-Commit-Position: refs/heads/master@{#330316}

[Sam Clegg, 2015-05-15 22:38:23]

sbc@chromium.org changed reviewers:
+ binji@chromium.org, thestig@chromium.org

[Lei Zhang, 2015-05-15 22:40:59]

lgtm, but you may need a build/OWNERS?

[Sam Clegg, 2015-05-16 00:26:19]

sbc@chromium.org changed reviewers:
+ dpranke@chromium.org

[Sam Clegg, 2015-05-16 00:26:37]

+dpranke for build/OWNERS

[Dirk Pranke, 2015-05-16 21:24:57]

lgtm

[Sam Clegg, 2015-05-17 22:48:22]

The CQ bit was checked by sbc@chromium.org

[Sam Clegg, 2015-05-17 22:48:23]

The patchset sent to the CQ was uploaded after l-g-t-m from thestig@chromium.org
Link to the patchset: https://codereview.chromium.org/1140503004/#ps50001
(title: " ")

[commit-bot: I haz the power, 2015-05-17 22:48:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1140503004/50001

[commit-bot: I haz the power, 2015-05-17 23:52:57]

Committed patchset #4 (id:50001)

[commit-bot: I haz the power, 2015-05-18 11:33:09]

Patchset 4 (id:??) landed as
https://crrev.com/ff8ec298fd273181647ec4d94c032343382dbe57
Cr-Commit-Position: refs/heads/master@{#330316}