Fix return code of rungetty.sh (#3881)

* Fix return code of rungetty.sh

In case of INITGETTY defined we will return exit code 1 which is not
expected

Signed-off-by: Petr Fedchenkov <giggsoff@gmail.com>

* Update getty sha

Signed-off-by: Petr Fedchenkov <giggsoff@gmail.com>

* restore package cache in LinuxKit Build Tests

Signed-off-by: Petr Fedchenkov <giggsoff@gmail.com>

Signed-off-by: Petr Fedchenkov <giggsoff@gmail.com>

.github/workflows/ci.yml

@@ -225,7 +225,7 @@ jobs:
 
   test_linuxkit:
     name: LinuxKit Build Tests
-    needs: build
+    needs: [ build_packages, build ]
     runs-on: ubuntu-latest
     steps:
     - name: Check out code
@@ -244,6 +244,14 @@ jobs:
         path: bin
         key: rtf-${{hashFiles('Makefile')}}
 
+    - name: Restore Package Cache
+      uses: actions/cache@v2
+      with:
+        path: ~/.linuxkit/cache/
+        key: ${{ runner.os }}-linuxkit-${{ github.sha }}
+        restore-keys: |
+          ${{ runner.os }}-linuxkit-
+
     - name: Build RTF
       if: steps.cache-rtf.outputs.cache-hit != 'true'
       run: make bin/rtf