made mock-build params consistent with brew scan tekton task, added -p flag

k8s/stage/osh-client-tekton/task/osh-scan-scm-task.yaml

@@ -20,7 +20,7 @@ spec:
   - name: mock-build-params
     type: string
     description: Parameters pushed to mock build
-    default: "-p snyk-only-unstable --tarball-build-script=:"
+    default: "snyk-only-unstable --tarball-build-script=:"
 
   - name: archive-name
     type: string
@@ -100,4 +100,4 @@ spec:
         mkdir $(params.tarball-storage-dir)
         cp $(params.working-dir)/$(params.archive-name) $(params.tarball-storage-dir)/
         
-        covscan mock-build $(params.mock-build-params) $(params.working-dir)/$(params.archive-name)
+        covscan mock-build -p $(params.mock-build-params) $(params.working-dir)/$(params.archive-name)