Let clang-repl link privately against Clang components

First of all, this is the convention: all other tools have their
dependencies private. While it does not have an effect on linking
(there is no linking against executables), it does have an effect
on exporting: having the targets private allows installing the tools
without the libraries in a statically linked build, or a build against
libclang-cpp.so.

Reviewed By: v.g.vassilev

Differential Revision: https://reviews.llvm.org/D122546

clang/tools/clang-repl/CMakeLists.txt

@@ -11,7 +11,7 @@ add_clang_tool(clang-repl
   ClangRepl.cpp
   )
 
-clang_target_link_libraries(clang-repl PUBLIC
+clang_target_link_libraries(clang-repl PRIVATE
   clangBasic
   clangFrontend
   clangInterpreter