Add en docs for conv1d and Conv1D

doc/fluid/api/nn.rst

@@ -172,3 +172,5 @@ paddle.nn
     nn/AdaptiveAvgPool2d.rst
     nn/AdaptiveAvgPool3d.rst
     nn/layer/activation/Sigmoid.rst
+    nn/layer/conv/Conv1D.rst
+    nn/functional/conv/conv1d.rst

doc/fluid/api/nn/functional/conv/conv1d.rst

+..  THIS FILE IS GENERATED BY `gen_doc.{py|sh}`
+    !DO NOT EDIT THIS FILE MANUALLY!
+
+.. _api_nn_functional_conv_conv1d:
+
+conv1d
+------
+
+..  autofunction:: paddle.nn.functional.conv.conv1d
+    :noindex:
+

doc/fluid/api/nn/layer/conv/Conv1D.rst

+..  THIS FILE IS GENERATED BY `gen_doc.{py|sh}`
+    !DO NOT EDIT THIS FILE MANUALLY!
+
+.. _api_nn_layer_conv_Conv1D:
+
+Conv1D
+------
+
+..  autoclass:: paddle.nn.layer.conv.Conv1D
+    :members:
+    :inherited-members:
+    :noindex:
+