Map BUILD_ATOM_LINUX_ACCESS_TOKEN to ATOM_ACCESS_TOKEN

script/cibuild-atom-rpm

@@ -6,5 +6,5 @@ docker build -t atom-rpm .
 docker run \
  --env JANKY_SHA1="$JANKY_SHA1" \
  --env JANKY_BRANCH="$JANKY_BRANCH" \
- --env ATOM_ACCESS_TOKEN="$ATOM_ACCESS_TOKEN" \
+ --env ATOM_ACCESS_TOKEN="$BUILD_ATOM_LINUX_ACCESS_TOKEN" \
  atom-rpm /atom/script/rpmbuild