clamav: add new package (#11818)

* clamav: add new package

* fix flake8

* remove --dsable lines

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

+# 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 Clamav(AutotoolsPackage):
+    """Open source antivirus engine for detecting trojans,
+    viruses, malware & other malicious threats."""
+
+    homepage = "https://www.clamav.net/"
+    url      = "https://www.clamav.net/downloads/production/clamav-0.101.2.tar.gz"
+
+    version('0.101.2', sha256='0a12ebdf6ff7a74c0bde2bdc2b55cae33449e6dd953ec90824a9e01291277634')
+
+    depends_on('pkg-config', type='build')
+    depends_on('json-c')
+    depends_on('openssl')
+    depends_on('pcre')
+    depends_on('yara')
+    depends_on('zlib')
+    depends_on('bzip2')
+
+    def configure_args(self):
+        spec = self.spec
+        args = [
+            '--enable-llvm=no',
+            '--with-libjson=%s' % spec['json-c'].prefix,
+            '--with-openssl=%s' % spec['openssl'].prefix,
+            '--with-pcre=%s' % spec['pcre'].prefix,
+            '--with-zlib=%s' % spec['zlib'].prefix,
+            '--with-bzip2=%s' % spec['bzip2'].prefix
+        ]
+        return args