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

This pulls in the following LLVM change:

63a5544: (petar.jovanovic@rt-rk.com) Cherry-pick r247546: [mips] Save a copy of MipsABIInfo ...

BUG=none
TEST= PNaCl toolchain trybots

Change-Id: Iaf00b13f2f4164b047c6d21937daf1e8baec0745
Reviewed-on: https://chromium-review.googlesource.com/435239
Reviewed-by: Derek Schuff <3cf7ba45f835c4cf8b5fe7d6a48fa95fd7df4df7@chromium.org>

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