Revert r259961, r259978, r259981.

The "sanitizer-windows" buildbot has been failing for two days because of this:

FAILED: cl.exe asan_report.cc
asan_scariness_score.h(60) : error C2536:
  '__asan::ScarinessScore::__asan::ScarinessScore::descr' :
      cannot specify explicit initializer for arrays
asan_scariness_score.h(60) : see declaration of '__asan::ScarinessScore::descr'

llvm-svn: 260059