Try to fix the assert in Alignment::alignAddr to work on 32-bit

Hopefully fixing the AlignmentDeathTest.AlignAddr failures (e.g. at
http://lab.llvm.org:8011/builders/clang-cmake-armv7-quick/builds/10925)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375090 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed