Do not disable RTTI by default in the CMake build

cmake/CMakeLists.txt

@@ -40,12 +40,12 @@ endif()
 if(WITH_PROTOC)
   set(protobuf_PROTOC_EXE ${WITH_PROTOC} CACHE FILEPATH "Protocol Buffer Compiler executable" FORCE)
 endif()
-option(protobuf_DISABLE_RTTI "Remove runtime type information in the binaries" ON)
 option(protobuf_BUILD_TESTS "Build tests" ON)
 option(protobuf_BUILD_CONFORMANCE "Build conformance tests" OFF)
 option(protobuf_BUILD_EXAMPLES "Build examples" OFF)
 option(protobuf_BUILD_PROTOC_BINARIES "Build libprotoc and protoc compiler" ON)
 option(protobuf_BUILD_LIBPROTOC "Build libprotoc" OFF)
+option(protobuf_DISABLE_RTTI "Remove runtime type information in the binaries" OFF)
 if (BUILD_SHARED_LIBS)
   set(protobuf_BUILD_SHARED_LIBS_DEFAULT ON)
 else (BUILD_SHARED_LIBS)