[CMake] Use PRIVATE in target_link_libraries for fuzzers.

Several fuzzers were missed by r319840.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@319948 91177308-0d34-0410-b5e6-96231b3b80d8

tools/clang-format/fuzzer/CMakeLists.txt

@@ -10,6 +10,7 @@ add_clang_executable(clang-format-fuzzer
   )
 
 target_link_libraries(clang-format-fuzzer
+  PRIVATE
   ${CLANG_FORMAT_LIB_DEPS}
   ${LLVM_LIB_FUZZING_ENGINE}
   )

tools/clang-fuzzer/CMakeLists.txt

@@ -48,6 +48,7 @@ if(CLANG_ENABLE_PROTO_FUZZER)
     )
 
   target_link_libraries(clang-proto-fuzzer
+    PRIVATE
     ${ProtobufMutator_LIBRARIES}
     ${PROTOBUF_LIBRARIES}
     ${LLVM_LIB_FUZZING_ENGINE}

tools/clang-fuzzer/proto-to-cxx/CMakeLists.txt

@@ -11,4 +11,4 @@ add_clang_library(clangProtoToCXX proto_to_cxx.cpp
                   )
 
 add_clang_executable(clang-proto-to-cxx proto_to_cxx_main.cpp)
-target_link_libraries(clang-proto-to-cxx clangProtoToCXX)
+target_link_libraries(clang-proto-to-cxx PRIVATE clangProtoToCXX)