Import the platform:f29 pseudo module on MBS stage

roles/mbs/common/files/default-modules.staging/platform-f29.yaml

@@ -0,0 +1,27 @@
+data:
+  description: Fedora 29 traditional base
+  license:
+    module: [MIT]
+  name: platform
+  profiles:
+    buildroot:
+      rpms: [bash, bzip2, coreutils, cpio, diffutils, fedora-release, findutils, gawk,
+        grep, gzip, info, make, patch, redhat-rpm-config, rpm-build, sed, shadow-utils,
+        tar, unzip, util-linux, which, xz]
+    srpm-buildroot:
+      rpms: [bash, fedora-release, fedpkg-minimal, gnupg2, redhat-rpm-config, rpm-build,
+        shadow-utils]
+  stream: f29
+  summary: Fedora 29 traditional base
+  context: 00000000
+  version: 5
+  xmd:
+    mbs:
+      buildrequires: {}
+      commit: f29
+      requires: {}
+      koji_tag: module-f29-build
+      mse: TRUE
+document: modulemd
+version: 1
+