增加libcurl库调用百度API，与原来的的go命令执行调用API两种。libcurl涉及静态链接，考虑使用哪种？

libcjson/lib/cmake/cJSON/cJSONConfig.cmake

@@ -0,0 +1,29 @@
+# Whether the utils lib was build.
+set(CJSON_UTILS_FOUND On)
+
+# The include directories used by cJSON
+set(CJSON_INCLUDE_DIRS "/opt/libcjson/include")
+set(CJSON_INCLUDE_DIR "/opt/libcjson/include")
+
+get_filename_component(_dir "${CMAKE_CURRENT_LIST_FILE}" PATH)
+
+# The cJSON library
+set(CJSON_LIBRARY "cjson")
+if(ON)
+  # Include the target
+  include("${_dir}/cjson.cmake")
+endif()
+
+if(CJSON_UTILS_FOUND)
+  # The cJSON utils library
+  set(CJSON_UTILS_LIBRARY cjson_utils)
+  # All cJSON libraries
+  set(CJSON_LIBRARIES "cjson_utils" "cjson")
+  if(ON)
+    # Include the target
+    include("${_dir}/cjson_utils.cmake")
+  endif()
+else()
+  # All cJSON libraries
+  set(CJSON_LIBRARIES "cjson")
+endif()