mpiext/cuda: do not include automatically generated file into dist tarball

ompi/mpiext/cuda/c/mpiext_cuda_c.h is automatically generated from
ompi/mpiext/cuda/c/mpiext_cuda_c.h.in at configure time.

Signed-off-by: Gilles Gouaillardet <gilles@rist.or.jp>

(cherry picked from commit open-mpi/ompi@f8318f0a8f)
(cherry picked from commit open-mpi/ompi@b3ce25af95)

ompi/mpiext/cuda/c/Makefile.am

@@ -4,6 +4,8 @@
 #                         Corporation.  All rights reserved.
 # Copyright (c) 2010-2014 Cisco Systems, Inc.  All rights reserved.
 # Copyright (c) 2015      NVIDIA, Inc. All rights reserved.
+# Copyright (c) 2018      Research Organization for Information Science
+#                         and Technology (RIST).  All rights reserved.
 # $COPYRIGHT$
 #
 # Additional copyrights may follow
@@ -28,7 +30,7 @@ noinst_LTLIBRARIES = libmpiext_cuda_c.la
 ompidir = $(ompiincludedir)/ompi/mpiext/cuda/c
 
 # This is the header file that is installed.
-ompi_HEADERS = mpiext_cuda_c.h
+nodist_ompi_HEADERS = mpiext_cuda_c.h
 
 # Sources for the convenience libtool library.  Other than the one
 # header file, all source files in the extension have no file naming