NaCl: Update revision in DEPS, r12241 -> r12284

This pulls in the following Native Client changes:

r12242: (jvoung) Update LLVM rev to pull in cherrypick of 187787.
r12243: (jvoung) Update PNaCl in TOOL_REVISIONS from 12187 to 12242.
r12244: (jvoung) Bump newlib revision for PNaCl too.
r12245: (khim) Handle a case when gcl is not available
r12246: (jvoung) Update expectations for TestCondvarSignalNoOp, etc. and README for tips.
r12247: (sehr) Make trusted tests work with memcheck....
r12249: (jvoung) Update PNaCl in TOOL_REVISIONS from 12242 to 12244.
r12250: (stichnot) Don't fail early if an exclude file has a problem.
r12251: (jvoung) Turn on some PNaCl mixed / native-object tests now that TC roll finished.
r12252: (mseaborn) Unsandboxed IRT: Add missing "const" to top-level IRT interface structs
r12253: (mseaborn) Unsandboxed IRT: Implement thread+futex interfaces, and some timer interfaces
r12254: (thakis) Store result of | operator in a variable instead of just the filename.
r12255: (khim) Use as/cc/ld flags in all situations
r12256: (petarj) [MIPS] Call AddBiasForPNaCl for float_rounding_mode_test
r12257: (dschuff) Use native objects instead of bitcode objects when building the IRT in debug mode.
r12258: (mcgrathr) Call dummy AssertSameType functions to avoid unused warnings
r12259: (mcgrathr) Remove miscellaneous unused variables and functions
r12260: (stichnot) Update the known failures file, and the llvm-test-suite DEPS.
r12261: (mcgrathr) Conditionalize conditionally-used variable kNaClTempPrefixVar
r12262: (mcgrathr) Update chrome_rev in DEPS
r12264: (mcgrathr) Revert "Update chrome_rev in DEPS"
r12266: (sbc) Roll glibc revision in REVISIONS.
r12267: (jfb) Support iconv to/from UTF-{8,16,32} for newlib (NaCl and PNaCl).
r12268: (jfb) Allow our infrastructure to run libc++ tests.
r12269: (khim) Remove untracked files from git repos
r12270: (dschuff) When building Debug IRT, use -O2 instead of -O0 for the frontend
r12271: (mseaborn) Unsandboxed IRT: Pass argv and environment arrays through to user code
r12272: (stichnot) Update llvm-test-suite DEPS and known-failure lists.
r12273: (dschuff) Use parallel builds in build_nexe.py even without goma
r12274: (jvoung) Avoid passing the made-up --pnacl-* flags to clang.
r12275: (jvoung) Adjust runtime_vortex and ammp for x86-32 and x86-64.
r12276: (jfb) Test that iconv support to/from UTF-{8,16,32} for newlib (NaCl and PNaCl) works.
r12277: (thakis) Improve | logic after r12254.
r12280: (jfb) Unbreak PNaCl FYI bot archive frontend tests.
r12281: (eliben) Bump tools_rev so it pulls the new third_party/python_libs dir
r12283: (nyquist) Fix regular expression for nacl_bootstrap gyp
r12284: (thakis) Revert 12273 Use parallel builds in build_nexe.py even without goma

BUG=none
TBR=jvoung

Review URL: https://codereview.chromium.org/29203006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229526 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229526