PNaCl: Update subzero and llvm revision in pnacl/COMPONENT_REVISIONS
PNaCl: Update subzero and llvm revision in pnacl/COMPONENT_REVISIONS

This pulls in the following Subzero changes:

29acb57: (eholk@chromium.org) Subzero - WASM: Codegen fixes, better test infrastructure
1a478b1: (sagar.thakur@imgtec.com) [Subzero][MIPS] Implement conditional branches and integer comparisons
4aae81a: (eholk@chromium.org) Subzero. Wasm. Implement sbrk and correctly do bounds checks.
ae15f0f: (jpp@chromium.org) Subzero. X86. Lowers shufflevector using xmm instructions.
de29f12: (jpp@chromium.org) Subzero. X86. Uses pshufb for shufflevector lowering.
87def2c: (eholk@chromium.org) Subzero, Wasm: Dynamically reallocate read buffer. Runtime improvements.
179a55d: (eholk@chromium.org) Subzero, WASM: stop writing uninitialized data to .o file. Add timers.
7146e99: (stichnot@chromium.org) Subzero: Suppress a warning as a result of an updated clang.
80ee5b3: (eholk@chromium.org) Subzero WASM: avoid needless comparisons, add bounds check flag option
38dcb59: (sagar.thakur@imgtec.com) [Subzero][MIPS32] Implement sext, zext and trunc
f5fdd23: (stichnot@chromium.org) Subzero: Update for LLVM 3.9 (trunk).
a5b16ab: (stichnot@chromium.org) Subzero: Add necessary PNaCl files for standalone build.
1040d86: (kschimpf@google.com) Remove compiler warning when building within LLVM trunk.
c2ee36a: (Srdjan.Obucina@imgtec.com) Subzero, MIPS32: Implement logical instructions ashr, lshr, shl

This pulls in the following LLVM change:

83991f9: (kschimpf@google.com) Remove compiler warning when building.

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4077
BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4136
BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4369
TEST= PNaCl toolchain trybots
R=jpp@chromium.org

Review URL: https://codereview.chromium.org/1987843002 .

sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client