Add a package: dmlc/mxnet. (#3579)

* Add dmlc/mxnet packags.

* Build mxnet+cuda+opencv with GCC-4.8.5 and GCC-5.4.0.

* Build mxnet version 0.10.0, 0.10.0.post1 and 0.10.0.post2.

* Add component version constrain for mxnet 0.10.0.x .

* Go through flake8.

* Replace commit hash with commit date as package version.

* Go throught Travis-CI.

* Update submodule version for 0.10.0.post2.

* Add openmp variant for dmlc-core and mxnet.

* Refine variant handling.

* Fix filter_file for dmlc-core.

* Cut long strings into multiple lies due to PEP8 requirements.

* Fix for PEP8.

* Add CUB_INCLUDE.

* Add py-mxnet: Python binding for MXNet.

* Remove distutils.dir_util.

* Add the profiler variant for mxnet.

* Add a shared variant for nnvm.

* Set USE_OPENMP to OFF by default.

* Fix flake8 errors.

* Fix flake8 issues.

* flake8 issues again.

var/spack/repos/builtin/packages/mshadow/package.py

@@ -0,0 +1,41 @@
+##############################################################################
+# Copyright (c) 2013-2016, Lawrence Livermore National Security, LLC.
+# Produced at the Lawrence Livermore National Laboratory.
+#
+# This file is part of Spack.
+# Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
+# LLNL-CODE-647188
+#
+# For details, see https://github.com/llnl/spack
+# Please also see the LICENSE file for our notice and the LGPL.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License (as
+# published by the Free Software Foundation) version 2.1, February 1999.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
+# conditions of the GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+##############################################################################
+from spack import *
+
+
+class Mshadow(Package):
+    """MShadow is a lightweight CPU/GPU Matrix/Tensor C++ Template Library.
+    in C++/CUDA."""
+
+    homepage = "https://github.com/dmlc/mshadow"
+    url      = "https://github.com/dmlc/mshadow/archive/v1.1.tar.gz"
+
+    version('master', git='https://github.com/dmlc/mshadow.git', branch='master')
+    version('20170721', git='https://github.com/dmlc/mshadow.git',
+            commit='20b54f068c1035f0319fa5e5bbfb129c450a5256')
+
+    def install(self, spec, prefix):
+        install_tree('mshadow', prefix.include.mshadow)
+        install_tree('make', prefix.make)