Add Package HSF-CMakeTools (#16951)

* [hsf-cmaketools] add package

* fix formatting

* Apply suggestions from code review

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

* [hsf-cmaketools] remove cmake_prefix_path which is set already by spack

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

var/spack/repos/builtin/packages/hsf-cmaketools/package.py

@@ -0,0 +1,26 @@
+# Copyright 2013-2020 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 HsfCmaketools(Package):
+    """CMake 'Find' modules for commonly used HEP Packages"""
+
+    homepage = "https://github.com/HSF/cmaketools/"
+    url      = "https://github.com/HSF/cmaketools/archive/1.8.tar.gz"
+    git      = "https://github.com/HSF/cmaketools.git"
+
+    maintainers = ['vvolkl']
+
+    version('master', branch='master')
+    version('1.8', sha256='91af30f5701dadf80a5d7e0d808c224c934f0784a3aff2d3b69aff24f7e1db41')
+
+    # this package only needs to be installed in CMAKE_PREFIX_PATH
+    # which is set by spack
+    def install(self, spec, prefix):
+        mkdir(prefix.modules)
+        install_tree('modules', prefix.modules)
+        install("CMakeToolsConfig.cmake", prefix)