New package - TECkit (#14301)

This PR adds the teckit package to spack.

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

@@ -0,0 +1,29 @@
+# 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 Teckit(AutotoolsPackage):
+    """TECkit is a low-level toolkit intended to be used by applications for
+    conversions between text encodings. For example, it can be used when
+    importing legacy text into a Unicode-based application.
+
+    The primary component of TECkit is a library: the TECkit engine. The engine
+    relies on mapping tables in a specific, documented binary format. The
+    TECkit compiler creates these tables from plain-text, human-readable
+    descriptions."""
+
+    homepage = "https://scripts.sil.org/cms/scripts/page.php?cat_id=TECkit"
+    url      = "https://github.com/silnrsi/teckit/releases/download/v2.5.9/teckit-2.5.9.tar.gz"
+
+    version('2.5.9', sha256='6823fb3142efa34e5d74de35d37cdf4724efbf577f5ff15a8e2b364e6ef47d3d')
+
+    depends_on('expat')
+    depends_on('zlib')
+
+    def configure_args(self):
+        args = ['--with-system-zlib']
+        return args