Added Cinch Spackage (#11759)

* Added Cinch Spackage and updated Flecsi to Use It

Added spackage for Cinch build system and updated flecsi spackage to use
the external version of cinch

* Flake8 compliance for Cinch and Flecsi

* Fixed Cinch Issue and Requested PR Changes

Swapped cinch back to master branch rather than test branch and style
issues for PR

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

@@ -0,0 +1,28 @@
+# Copyright 2013-2019 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class Cinch(Package):
+    """
+        Cinch is a set of utilities and configuration options designed to make
+        cmake builds easy to use and manage.
+    """
+
+    homepage = "https://github.com/laristra/cinch"
+    url = "https://github.com/laristra/cinch/archive/1.0.zip"
+    git      = "https://github.com/laristra/cinch.git"
+
+    version('develop', branch='master', submodules=False)
+    version('1.0', sha256='98b73473829b478191481621d84c3d63c662da6e951321f858a032eae3ca07b7')
+
+    def install(self, spec, prefix):
+        # (CMake) Header Only library so just copy
+        install_tree(self.stage.source_path, prefix)
+
+    def setup_dependent_environment(self, spack_env, run_env, dependent_spec):
+        spack_env.prepend_path('CMAKE_PREFIX_PATH', self.prefix)
+        spack_env.set('CINCH_SOURCE_DIR', self.prefix)