added new repositories for mcp salt and extra

Change-Id: Id279804a0af7d55481ffaefe3c0c498ff50be510
diff --git a/linux/system/repo/mcp/salt.yml b/linux/system/repo/mcp/salt.yml
new file mode 100644
index 0000000..08e7614
--- /dev/null
+++ b/linux/system/repo/mcp/salt.yml
@@ -0,0 +1,10 @@
+parameters:
+  _param:
+    apt_mk_version: stable
+  linux:
+    system:
+      repo:
+        mcp_extra:
+          source: "deb [arch=amd64] http://apt-mk.mirantis.com/${_param:linux_system_codename}/ ${_param:apt_mk_version} salt"
+          architectures: amd64
+          key_url: "http://apt-mk.mirantis.com/public.gpg"
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