Add three missing CMake variables that need to make it to the LLVMConfig.cmake file that is (I think) used in the stand-alone Clang build, and causing link errors there w.r.t. curses.
Add three missing CMake variables that need to make it to the
LLVMConfig.cmake file that is (I think) used in the stand-alone Clang
build, and causing link errors there w.r.t. curses.

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@187950 91177308-0d34-0410-b5e6-96231b3b80d8

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