[fix] Move desktop submodule into /dist/desktop

.gitmodules

 [submodule "cesium-desktop"]
-	path = platforms/desktop
+	path = dist/desktop
 	url = git@git.duniter.org:clients/cesium-grp/cesium-desktop.git
 [submodule "cesium-android"]
 	path = platforms/android

github.sh

@@ -89,7 +89,7 @@ case "$1" in
       echo "Uploading files to ${upload_url} ..."
       dirname=$(pwd)
 
-      ZIP_FILE="$dirname/platforms/web/build/${PROJECT_NAME}-v$current-web.zip"
+      ZIP_FILE="$dirname/dist/web/build/${PROJECT_NAME}-v$current-web.zip"
       if [[ -f "${ZIP_FILE}" ]]; then
         result=$(curl -s -H ''"$GITHUT_AUTH"'' -H 'Content-Type: application/zip' -T "${ZIP_FILE}" "${upload_url}?name=${PROJECT_NAME}-v${current}-web.zip")
         browser_download_url=$(echo "$result" | grep -P "\"browser_download_url\":[ ]?\"[^\"]+" | grep -oP "\"browser_download_url\":[ ]?\"[^\"]+"  | grep -oP "https://[A-Za-z0-9/.-]+")

release.sh

@@ -130,7 +130,7 @@ echo "- Executing git push, with tag: v$2"
 echo "----------------------------------"
 
 # Commit
-cd $DIRNAME
+cd ${DIRNAME}
 git reset HEAD
 git add package.json config.xml install.sh www/js/config.js www/manifest.json
 git commit -m "v$2"
@@ -168,8 +168,8 @@ if [[ $? -ne 0 ]]; then
   exit 1
 fi
 
-if [[ -d "${DIRNAME}/platforms/desktop" ]]; then
-  cd "${DIRNAME}/platforms/desktop"
+if [[ -d "${DIRNAME}/dist/desktop" ]]; then
+  cd "${DIRNAME}/dist/desktop"
 
   # Fetch last updates
   git fetch origin && git merge origin/master || exit 1
@@ -180,7 +180,8 @@ if [[ -d "${DIRNAME}/platforms/desktop" ]]; then
       exit 1
   fi
 else
-  echo "WARN: platform/desktop not found -> Skipping desktop build!"
+  echo "ERROR: dist/desktop not found -> Make sure git submodule has been init!"
+  exit 1
 fi;
 
 # back to nodejs version 6