Add new package: symlinks (#18925)

* Add new package: symlinks

* refine edit()

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

@@ -0,0 +1,23 @@
+# 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 Symlinks(MakefilePackage):
+    """Scan or change symbolic links."""
+
+    homepage = "http://ibiblio.org/pub/Linux/utils/file"
+    url      = "http://ibiblio.org/pub/Linux/utils/file/symlinks-1.4.tar.gz"
+
+    version('1.4', sha256='4818a3be253b53f2547fe51349652c87301794fc2ff4e3104850301ffe9843a0')
+
+    def edit(self, spec, prefix):
+        filter_file('/usr/local', prefix, 'Makefile', string=True)
+
+    def install(self, spec, prefix):
+        mkdirp(prefix.bin)
+        mkdirp(prefix.man.man8)
+        make('install')