Merge pull request #11437 from chengduoZH/Add_conv3d_Python_API

Add conv3d/pool3d/conv3d_trans Python API

Author: chengduo

doc/fluid/api/layers.rst

@@ -342,6 +342,12 @@ conv2d
 ..  autofunction:: paddle.fluid.layers.conv2d
     :noindex:
 
+conv3d
+------
+
+..  autofunction:: paddle.fluid.layers.conv3d
+    :noindex:
+
 sequence_pool
 -------------
 
@@ -366,6 +372,12 @@ pool2d
 ..  autofunction:: paddle.fluid.layers.pool2d
     :noindex:
 
+pool3d
+------
+
+..  autofunction:: paddle.fluid.layers.pool3d
+    :noindex:
+
 batch_norm
 ----------
 
@@ -384,6 +396,13 @@ conv2d_transpose
 ..  autofunction:: paddle.fluid.layers.conv2d_transpose
     :noindex:
 
+conv3d_transpose
+----------------
+
+..  autofunction:: paddle.fluid.layers.conv2d_transpose
+    :noindex:
+
+
 sequence_expand
 ---------------