CI: Add support for ALT Linux

Build on Sisyphus branch which is bleeding edge repository.
Package manager is apt-rpm (not APT as it may look from the scripts).

Signed-off-by: Vitaly Chikunov <vt@altlinux.org>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>

ci/alt.sh

@@ -0,0 +1,24 @@
+#!/bin/sh -ex
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Install build env for ALT Linux
+
+apt-get update -y
+
+# rpm-build brings basic build environment with gcc, make, autotools, etc.
+apt-get install -y \
+		$CC \
+		$TSS \
+		asciidoc \
+		attr \
+		docbook-style-xsl \
+		libattr-devel \
+		libkeyutils-devel \
+		libssl-devel \
+		openssl \
+		openssl-gost-engine \
+		rpm-build \
+		wget \
+		xsltproc \
+		xxd \
+	&& control openssl-gost enabled