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>

.travis.yml

@@ -67,6 +67,10 @@ matrix:
           env: DISTRO=debian:stable TSS=ibmtss
           compiler: gcc
 
+        - os: linux
+          env: DISTRO=alt:sisyphus TSS=libtpm2-tss-devel
+          compiler: gcc
+
 before_install:
     # Tumbleweed requires podman and newest runc due docker incompatible with glibc 2.33 (faccessat2)
     - CONTAINER="${CONTAINER:-docker}"