Remove 'using' declarations in relocation packer's debug.h.

Remove 'using' declarations in relocation packer's debug.h.

Back out 'using' declarations added in 7d58839.  These break
builds where host_clang=0:

BUG=385553
Committed: https://crrev.com/2510b4b9d48eade75d5c39a39dfa31b9c4b5456c
Cr-Commit-Position: refs/heads/master@{#316566}

[simonb (inactive), 2015-02-16 18:49:42]

simonb@chromium.org changed reviewers:
+ rmcilroy@chromium.org

[rmcilroy, 2015-02-17 09:39:59]

On 2015/02/16 18:49:42, simonb wrote:

lgtm.

[simonb (inactive), 2015-02-17 10:56:59]

The CQ bit was checked by simonb@chromium.org

[commit-bot: I haz the power, 2015-02-17 10:57:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/921683005/1

[commit-bot: I haz the power, 2015-02-17 11:02:42]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-02-17 11:02:43]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[simonb (inactive), 2015-02-17 12:37:12]

The CQ bit was checked by simonb@chromium.org

[commit-bot: I haz the power, 2015-02-17 12:37:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/921683005/1

[commit-bot: I haz the power, 2015-02-17 12:40:09]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-17 12:40:52]

Patchset 1 (id:??) landed as
https://crrev.com/2510b4b9d48eade75d5c39a39dfa31b9c4b5456c
Cr-Commit-Position: refs/heads/master@{#316566}