swift234

[upstream-update] Link LLVMDebugInfoCodeView into 6 executable tools. (#4489)

All of these cases seem to need the symbols from LLVM's new CodeView library to
link.

The specific executables are:

1. Swift Driver.
2. SIL Extract.
3. SIL Opt.
4. Swift IDE Test.
5. Swift LLVM Opt.
6. LLDB Module Import Test