ci: compliance: fail on errors

Fail workflow in case of script crashes.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

.github/workflows/compliance.yml

@@ -36,6 +36,7 @@ jobs:
         west update
 
     - name: Run Compliance Tests
+      continue-on-error: true
       id: compliance
       env:
         BASE_REF: ${{ github.base_ref }}
@@ -48,7 +49,7 @@ jobs:
         # debug
         ls -la
         git log  --pretty=oneline | head -n 10
-        ./scripts/ci/check_compliance.py -m Codeowners -m Devicetree -m Gitlint -m Identity -m Nits -m pylint -m checkpatch -m Kconfig -c origin/${BASE_REF}.. || true
+        ./scripts/ci/check_compliance.py -m Codeowners -m Devicetree -m Gitlint -m Identity -m Nits -m pylint -m checkpatch -m Kconfig -c origin/${BASE_REF}..
 
     - name: upload-results
       uses: actions/upload-artifact@master
@@ -59,6 +60,10 @@ jobs:
 
     - name: check-warns
       run: |
+        if [[ ! -s "compliance.xml" ]]; then
+          exit 1;
+        fi
+
         for file in Nits.txt checkpatch.txt Identity.txt Gitlint.txt pylint.txt Devicetree.txt Kconfig.txt Codeowners.txt; do
           if [[ -s $file ]]; then
             errors=$(cat $file)