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

This pulls in the following LLVM changes:

d7a651b: (kschimpf@google.com) Fix compiler warning about non-virtual destructor.
2d3e6fe: (kschimpf@google.com) Trace abbreviations use to compressed file in pnacl-bccompress.
abfef0e: (kschimpf@google.com) Rename files containing PNaCl bitcode distribution maps.

BUG= https://code.google.com/p/nativeclient/issues/detail?id=3720
TEST= PNaCl toolchain trybots
R=dschuff@chromium.org

Review URL: https://codereview.chromium.org/132233002

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@12595 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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