Update ctc.config.root documentation to include remark on default library path

Signed-off-by: João Victor Tozatti Risso <joaovictor.risso@gmail.com>

Update ctc.config.root documentation to include remark on default library path
ecabd259 · João Victor Tozatti Risso · 4b45983c · ecabd259 · ecabd259
--- a/doc/library/gpuarray/ctc.txt
+++ b/doc/library/gpuarray/ctc.txt
@@ -8,8 +8,9 @@
    Usage of connectionist temporal classification (CTC) loss Op, requires that
    the `warp-ctc <https://github.com/baidu-research/warp-ctc>`_ library is
-    available. Also, the ``config.ctc.root`` configuration option must be appropriately
+    available. In case the warp-ctc library is not in your compiler's library path,
-    set to the directory containing the warp-ctc library files.
+    the ``config.ctc.root`` configuration option must be appropriately set to the
+    directory containing the warp-ctc library files.
 .. note::

--- a/doc/library/tensor/nnet/ctc.txt
+++ b/doc/library/tensor/nnet/ctc.txt
@@ -8,8 +8,9 @@
    Usage of connectionist temporal classification (CTC) loss Op, requires that
    the `warp-ctc <https://github.com/baidu-research/warp-ctc>`_ library is
-    available. Also, the ``config.ctc.root`` configuration option must be appropriately
+    available. In case the warp-ctc library is not in your compiler's library path,
-    set to the directory containing the warp-ctc library files.
+    the ``config.ctc.root`` configuration option must be appropriately set to the
+    directory containing the warp-ctc library files.
 .. note::