[analyzer] Really turn on dynamic-bifurcation on by default.

Thanks to Byoungyoung for realizing taht we are not passing the default
option correctly.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164543 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed