Finish up CMake support for LLDB (tested on Linux)
- add missing scripts (driver, tests, etc...)
- enable running of tests from cmake with "make check-lldb" target
- fix up problem with clang dependencies (this enables parallel builds)
- implement platform-specific FIXMEs in source/CMakeLists.txt




git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@176306 91177308-0d34-0410-b5e6-96231b3b80d8