Merge pull request #4320 from vieux/buffer_test_integration_line_by_line

Add --line-buffered to the integration test output filtering
Upstream-commit: 88b774d092bd4626ca5373892ea50dc04d546302
Component: engine

components/engine/hack/make/test-integration

@@ -12,5 +12,5 @@ bundle_test_integration() {
 # this "grep" hides some really irritating warnings that "go test -coverpkg"
 # spews when it is given packages that aren't used
 bundle_test_integration 2>&1 \
-	| grep -v '^warning: no packages being tested depend on ' \
+	| grep --line-buffered -v '^warning: no packages being tested depend on ' \
 	| tee $DEST/test.log