Revert of NaCl: Update revision in DEPS, r13759 -> r13770 (patchset #1 id:1 of https...

Revert of NaCl: Update revision in DEPS, r13759 -> r13770 (patchset #1 id:1 of https://codereview.chromium.org/604483002/)

Reason for revert:
As noted, breaks goma builds.

Original issue's description:
> NaCl: Update revision in DEPS, r13759 -> r13770
>
> This pulls in the following Native Client changes:
>
> r13760: (mseaborn) untrusted.gypi: Factor out duplicated "--gomadir" option
> r13761: (mseaborn) Fix mmap() with length > 0xffff0000 to behave consistently on 32/64-bit
> r13762: (teravest) Support file path metadata for the main nexe.
> r13763: (teravest) Add CreateNaClDescWithFilePathMetadata fn.
> r13764: (dschuff) Switch PNaCl lib, include, and translator directories for new layout
> r13765: (dschuff) Pass naclsdk_validate=0 to scons runs run by main waterfall bots
> r13768: (dbrazdil) Allowed decrementing program break with sbrk() in MinSFI
> r13769: (dyen) Added tests for rename functions in irt_ext.
> r13770: (dyen) Added tests for unlink functions irt_ext.
>
> BUG=none
> TEST=browser_tests and nacl_integration
> CQ_EXTRA_TRYBOTS=tryserver.chromium.linux:linux_rel_precise32,linux_nacl_sdk,linux_chromium_dbg
> TBR=dschuff@chromium.org
>
> Committed: https://crrev.com/a86ea9cb2d97183ae3080b7325bdc23e392ce96c
> Cr-Commit-Position: refs/heads/master@{#296654}

TBR=dschuff@chromium.org,sergeyv@chromium.org,mseaborn@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=none

Review URL: https://codereview.chromium.org/605743002

Cr-Commit-Position: refs/heads/master@{#296705}