add paddleclas submodule

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "dygraph/PaddleClas"]
+	path = dygraph/PaddleClas
+	url = https://github.com/PaddlePaddle/PaddleClas

dygraph/.gitmodules

@@ -1,9 +0,0 @@
-[submodule "PaddleSeg"]
-	path = PaddleSeg
-	url = https://github.com/PaddlePaddle/PaddleSeg.git
-[submodule "PaddleDetection"]
-	path = PaddleDetection
-	url = https://github.com/PaddlePaddle/PaddleDetection.git
-[submodule "PaddleClas"]
-	path = PaddleClas
-	url = https://github.com/PaddlePaddle/PaddleClas.git

dygraph/PaddleClas

@@ -0,0 +1 @@
+Subproject commit 725a8ffda618eb8da16171a6b2006f6ab85e9928