修复git配置文件被删除的bug

Signed-off-by: a1012112796 <1012112796@qq.com>

sharelib.py

@@ -177,12 +177,24 @@ class SharelibHandler:
         finit_cpp.close()
 
     def export(self, share_lib_path):
+        reserved_subdir = ['.git', 
+        'README.md', '.gitignore', '.gitmodules', '.gitattributes',
+        '.drone.yml']
+
         dist_path = share_lib_path + '/' + self._lib_name
         if os.path.exists(dist_path):
-            shutil.rmtree(dist_path)
+            for d in os.listdir(dist_path):
+                if d in reserved_subdir:
+                    continue
+
+                pth = os.path.join(dist_path, d)
+                if os.path.isfile(pth):
+                    os.remove(pth)
+                    continue
+
+                shutil.rmtree(pth)
 
         print("dist_path: " + dist_path)
-        os.makedirs(dist_path)
 
         for item in self._items:
             if item._group == '':