message: [cmake] remove the last remaining LLDB_PATH_TO_LLVM_DIR
  This variable was removed the other day yet the cmake build retained
  one instance of it. Remove it.
diff: @@ -182,7 +182,7 @@ if(EXISTS ${LLDB_PATH_TO_SWIFT_BUILD}/lib${LLVM_LIBDIR_SUFFIX}/swift/clang)
  set(CLANG_RESOURCE_PATH "${LLDB_PATH_TO_SWIFT_BUILD}/lib${LLVM_LIBDIR_SUFFIX}/swift/clang")
  elseif(LLDB_BUILT_STANDALONE)
  set(CLANG_VERSION ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH})
  - set(CLANG_RESOURCE_PATH "${LLDB_PATH_TO_CLANG_BUILD}/lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION}")
  + set(CLANG_RESOURCE_PATH "${Clang_DIR}/../../../lib${LLVM_LIBDIR_SUFFIX}/clang/${CLANG_VERSION}")
  if(NOT EXISTS ${CLANG_RESOURCE_PATH})
  message(SEND_ERROR "standalone build cannot locate clang resource directory")
  endif()
  