PNaCl: Update compiler-rt revision in pnacl/COMPONENT_REVISIONS
PNaCl: Update compiler-rt revision in pnacl/COMPONENT_REVISIONS

This pulls in the following compiler-rt change:

8f8e4b2: (dschuff@chromium.org) Add int128 compiler_rt functions for x86-64

BUG= https://code.google.com/p/nativeclient/issues/detail?id=4112
TEST= PNaCl toolchain trybots
TBR=jfb@chromium.org

Review URL: https://codereview.chromium.org/1053173002

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