Add git safe.directory workaround in emscripten build script

Co-authored-by: Kamil Śliwak <kamil.sliwak@codepoets.it>

scripts/ci/build_emscripten.sh

@@ -40,12 +40,9 @@ else
 	BUILD_DIR="$1"
 fi
 
-apt-get update
-apt-get install lz4 --no-install-recommends
-
 WORKSPACE=/root/project
 
-cd $WORKSPACE
+cd "$WORKSPACE"
 
 # shellcheck disable=SC2166
 if [[ "$CIRCLE_BRANCH" = release || -n "$CIRCLE_TAG" || -n "$FORCE_RELEASE" || "$(git tag --points-at HEAD 2>/dev/null)" == v* ]]