[gnome-runtime-images] Fix a broken path.

[Jordan Petridis <jpetridis src gnome org>]

commit c491c256ea4dd3eab6d1a534ca40650465b64c4d
Author: Jordan Petridis <jordanpetridis protonmail com>
Date:   Mon Jun 4 15:08:03 2018 +0300

    Fix a broken path.

 .gitlab-ci.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0b6b87d..21e1f92 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -71,7 +71,7 @@ rust:master:
         # https://stackoverflow.com/questions/2264428/converting-string-to-lower-case-in-bash#2264537
         - export NAMESPACE="$(echo "${CI_PROJECT_NAMESPACE}" | tr A-Z a-z)"
         - export IMAGE="${CI_REGISTRY}/${NAMESPACE}/${CI_PROJECT_NAME}/rust_bundle:master"
-        - export OCI_YML=-sdk-bundles/rust.yml
+        - export OCI_YML="sdk-bundles/rust.yml"
 
         - export BASE_IMAGE="registry.gitlab.gnome.org/gnome/gnome-runtime-images/gnome:master"
         - sed -e "s|@BASE_IMAGE@|$BASE_IMAGE|" sdk-bundles/rust-bundle.template > sdk-bundles/rust.yml
@@ -83,7 +83,7 @@ rust:3.28:
         # https://stackoverflow.com/questions/2264428/converting-string-to-lower-case-in-bash#2264537
         - export NAMESPACE="$(echo "${CI_PROJECT_NAMESPACE}" | tr A-Z a-z)"
         - export IMAGE="${CI_REGISTRY}/${NAMESPACE}/${CI_PROJECT_NAME}/rust_bundle:3.28"
-        - export OCI_YML=-sdk-bundles/rust.yml
+        - export OCI_YML="sdk-bundles/rust.yml"
 
         - export BASE_IMAGE="registry.gitlab.gnome.org/gnome/gnome-runtime-images/gnome:3.28"
         - sed -e "s|@BASE_IMAGE@|$BASE_IMAGE|" sdk-bundles/rust-bundle.template > sdk-bundles/rust.yml