[ARM] Call setBooleanContents(ZeroOrOneBooleanContent)

The ARM backend should call setBooleanContents so that it can
use known bits to make some optimizations.

Review: D35821

Patch by Joel Galenson <jgalenson@google.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@311446 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed