Update cfi/blacklist.txt for new file names after the Great Blink mv

LifeCycleObserver.h -> lifecycle_observer.h

TBR=pcc@chromium.org
NOTREECHECKS=true
NOTRY=true

Bug: 768828
Change-Id: Iddf93f4ca33e0f842f31f0b30bb45d041e8093ed
Reviewed-on: https://chromium-review.googlesource.com/1000895Reviewed-by: Kent Tamura <tkent@chromium.org>
Commit-Queue: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#549070}

tools/cfi/blacklist.txt

@@ -57,7 +57,7 @@ fun:*DatabaseContext*contextDestroyed*
 
 # FIXME: Cannot handle template function LifecycleObserver<>::setContext,
 # so exclude source file for now. 
-src:*LifecycleObserver.h*
+src:*lifecycle_observer.h*
 
 #############################################################################
 # Methods disabled due to perf considerations.