try again with build out of repo

.gitlab-ci.yml

@@ -55,7 +55,7 @@ webserver-deploy:
 
 .build-windows: &build-windows
     - 'call vcvars64.bat'
-    - if not exist ../ftl_build mkdir ../ftl_build
+    - if not exist "../ftl_build" mkdir "../ftl_build"
     - cd ../ftl_build
     - cmake %CMAKE_ARGS% %CMAKE_ARGS_WINDOWS% -DREALSENSE_DIR="C:/Program Files (x86)/Intel RealSense SDK 2.0" -DOPENVR_DIR="C:/Program Files (x86)/OpenVRSDK" -DOPUS_DIR="C:/Program Files (x86)/Opus" ..
     - devenv ftl.utu.fi.sln /build Release