update default.xml.

Signed off by: mamingshuai <mamingshuai1@huawei.com>

default.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <manifest>
   <remote fetch="." name="origin" review="https://openharmony.gitee.com/openharmony/"/>
-  <default remote="origin" revision="master" sync-j="4" clone-depth="1" />
+  <default remote="origin" revision="master" sync-j="4" />
   <project name="aafwk_aafwk_lite" path="foundation/aafwk/aafwk_lite"  />
   <project name="ace_engine_lite" path="foundation/ace/ace_engine_lite"  />
   <project name="ai_engine" path="foundation/ai/engine"  />
@@ -79,7 +79,7 @@
   <project name="third_party_libjpeg" path="third_party/libjpeg"  />
   <project name="third_party_libpng" path="third_party/libpng"  />
   <project name="third_party_libuuid" path="third_party/libuuid"  />
-  <project name="third_party_Linux_Kernel" path="third_party/Linux_Kernel"  />
+  <project name="third_party_Linux_Kernel" path="third_party/Linux_Kernel"  clone-depth="1" />
   <project name="third_party_littlefs" path="third_party/littlefs"  />
   <project name="third_party_ltp" path="third_party/ltp"  />
   <project name="third_party_LVM2" path="third_party/LVM2"  />