Add #ifndef NDEBUG markers around EXPECT_DEATH after r267270

http://bb.pgr.jp/builders/cmake-llvm-x86_64-linux/builds/36076

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267275 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed