MIPS: Improve --rpath and --dynamic-linker handling in gyp.

MIPS: Improve --rpath and --dynamic-linker handling in gyp.

BUG=

Committed: https://crrev.com/403799183a20641922980f20d76cda8f79ff7f71
Cr-Commit-Position: refs/heads/master@{#28842}

[balazs.kilvady, 2015-06-03 13:03:51]

balazs.kilvady@imgtec.com changed reviewers:
+ akos.palfi@imgtec.com, dusan.milosavljevic@imgtec.com, paul.lind@imgtec.com

[balazs.kilvady, 2015-06-03 13:03:51]

Seems to work fine at cross-compiling for all the supported mips archs. And
simulator builds also work. Although I didn't have time to try out all the
possible  configuration with all the arch variants. And we need lgtm from Google
guys.

[balazs.kilvady, 2015-06-04 17:14:20]

I rebased the patch and added the target_conditions check so the --rpath and
--dynamic-linker flags are not used for building mksnapshot. I tested it with
mips64el only. Further tests are in progress.

[dusmil.imgtec, 2015-06-05 15:42:20]

Lgtm, need approval from Google team.

[dusmil.imgtec, 2015-06-05 15:42:48]

dusan.milosavljevic@imgtec.com changed reviewers:
+ jkummerow@google.com

[Jakob Kummerow, 2015-06-05 15:57:54]

jkummerow@chromium.org changed reviewers:
+ jkummerow@chromium.org

[Jakob Kummerow, 2015-06-05 15:57:55]

LGTM with nits.

https://codereview.chromium.org/1160973006/diff/20001/build/toolchain.gypi
File build/toolchain.gypi (right):

https://codereview.chromium.org/1160973006/diff/20001/build/toolchain.gypi#ne...
build/toolchain.gypi:341: ['v8_target_arch==target_arch and
(v8_target_arch=="mips" or \
nit: I'd prefer if you could reorder the conditions (checking "... and
v8_target_arch==target_arch" last), so it's quicker to see that this block is
MIPS specific.

https://codereview.chromium.org/1160973006/diff/20001/build/toolchain.gypi#ne...
build/toolchain.gypi:359: ]
nit: trailing ',' for consistency.

[balazs.kilvady, 2015-06-08 13:58:59]

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

[balazs.kilvady, 2015-06-08 13:58:59]

The patchset sent to the CQ was uploaded after l-g-t-m from
dusan.milosavljevic@imgtec.com, jkummerow@chromium.org
Link to the patchset: https://codereview.chromium.org/1160973006/#ps40001
(title: "Fix nits.")

[commit-bot: I haz the power, 2015-06-08 13:59:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1160973006/40001

[commit-bot: I haz the power, 2015-06-08 14:25:56]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-06-08 14:26:05]

Patchset 3 (id:??) landed as
https://crrev.com/403799183a20641922980f20d76cda8f79ff7f71
Cr-Commit-Position: refs/heads/master@{#28842}