Update newlib version use in all toolchain builds

Update newlib version in tools/REVISIONS

This brings in the following newlib change:
41e7008: Revert "Fix race condition in concurrent printf and fopen."

For the pnacl toolchain which was lagging it also brings
in the following four changes:
cc9ce45: Add -D_I386MACH_ALLOW_HW_INTERRUPTS in configure.host for nacl
489f1d8: Include more of sys/types.h and sys/signal.h under NaCl
02b55a2: Define _POSIX_THREADS under NaCl.
9f95ad0: Fix computed jump calculations in ARM memcpy

TEST= toolchain bots + toolchain_build/toolchain_build.py
BUG= https://code.google.com/p/chromium/issues/detail?id=338220
R=mcgrathr@chromium.org

Committed: https://src.chromium.org/viewvc/native_client?view=rev&revision=12686

[Sam Clegg, 2014-01-30 18:51:21]

PTAL.  The windows toolchain bot failure don't look related to this change,
right?

[Roland McGrath, 2014-01-30 19:17:12]

lgtm

[Sam Clegg, 2014-02-01 22:52:56]

The CQ bit was checked by sbc@chromium.org

[commit-bot: I haz the power, 2014-02-01 22:52:59]

CQ is trying da patch. Follow status at
https://nativeclient-status.appspot.com/cq/sbc@chromium.org/146703007/40001

[Sam Clegg, 2014-02-01 22:53:30]

Committed patchset #3 manually as r12686 (presubmit successful).

[commit-bot: I haz the power, 2014-02-01 22:53:31]

CQ bit was unchecked on CL. Ignoring.

[commit-bot: I haz the power, 2014-02-01 22:53:32]

CQ bit was unchecked on CL. Ignoring.

[commit-bot: I haz the power, 2014-02-01 22:53:34]

CQ bit was unchecked on CL. Ignoring.