MIPS: Fix 'Assembler support for internal references.'

MIPS: Fix 'Assembler support for internal references.'

Added new INTERNAL_REFERENCE_ENCODED RelocInfo type to differentiate MIPS existing use of internal references in instructions from the new raw pointer reference needed for dd(Label*).

BUG=
TEST=cctest/test-assembler-mips/jump_tables1, cctest/test-assembler-mips/jump_tables2, cctest/test-assembler-mips/jump_tables3, cctest/test-run-machops/RunSwitch1

Committed: https://crrev.com/244ac6de8316259bc5878480e05348a369c08e2f
Cr-Commit-Position: refs/heads/master@{#26651}

[balazs.kilvady, 2015-02-13 19:29:53]

balazs.kilvady@imgtec.com changed reviewers:
+ akos.palfi@imgtec.com, bmeurer@chromium.org, danno@chromium.org,
dusan.milosavljevic@imgtec.com, gergely.kis@imgtec.com, jkummerow@chromium.org,
paul.lind@imgtec.com

[paul.l..., 2015-02-13 19:32:17]

LGTM. This needs v8 team reviewer for the small changes in assembler.h

[Jakob Kummerow, 2015-02-14 13:17:37]

lgtm

[balazs.kilvady, 2015-02-15 12:27:25]

The CQ bit was checked by balazs.kilvady@imgtec.com

[commit-bot: I haz the power, 2015-02-15 12:28:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/922043005/1

[commit-bot: I haz the power, 2015-02-15 12:50:46]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-15 12:50:56]

Patchset 1 (id:??) landed as
https://crrev.com/244ac6de8316259bc5878480e05348a369c08e2f
Cr-Commit-Position: refs/heads/master@{#26651}

[Michael Achenbach, 2015-02-16 18:48:43]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/934623003/ by machenbach@chromium.org.

The reason for reverting is: Breaks
http://build.chromium.org/p/chromium.fyi/builders/Android%20MIPS%20Builder%20....