gitlab-ci: use git clean -ffdx in build each commit test

The build script invoked is designed to run in a pristine checkout.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Doug Goldstein <cardoe@cardoe.com>

automation/gitlab-ci/build-each-commit.sh

@@ -15,4 +15,4 @@ fi
 echo "Building ${CI_COMMIT_BEFORE_SHA}..${CI_COMMIT_SHA}"
 
 NON_SYMBOLIC_REF=1 ./automation/scripts/build-test.sh ${CI_COMMIT_BEFORE_SHA} ${CI_COMMIT_SHA} \
-    bash -c "make -j4 distclean && ./automation/scripts/build"
+    bash -c "git clean -ffdx && ./automation/scripts/build"