Add a test case (incomplete) to check that settings and readings of program variabes work.
Add a test case (incomplete) to check that settings and readings of program
variabes work.


git-svn-id: b33bab8abb5b18c12ee100cd7761ab452d00b2b0@107914 91177308-0d34-0410-b5e6-96231b3b80d8

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