[lldb] Ignore various test artifacts (NFCI)
[lldb] Ignore various test artifacts (NFCI)

Differential Revision: https://reviews.llvm.org/D22988

git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@277346 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lldb,llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,llvm-mirror/lldb,apple/swift-lldb