Build PR builds in CodeBuild

This commit updates CodeCommit spec to build the CI builds in CodeCommit
instead of CodeDeploy.

Signed-off-by: Mark Kirichenko <[email protected]>

Author: atanzu

appspec.yml

@@ -11,6 +11,7 @@ phases:
     commands:
       - echo Build started on `date`
       - env | grep CODEBUILD > build_env.txt
+      - $CODEBUILD_SRC_DIR/ci_entrypoint.sh
   post_build:
     commands:
       - echo Build completed on `date`