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

This pulls in the following LLVM change:

ecaa2b4: (kschimpf@google.com) Add (nested) distribution maps to pnacl-bccompress.

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

Review URL: https://codereview.chromium.org/140843011

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@12645 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

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