[tests] make sure we delete infer-out at the start of the reactive test

Summary:
If we don't delete infer-out then it gets polluted with files from previous
versions of infer resulting in segfaults during `make test`.

Reviewed By: cristianoc

Differential Revision: D4397723

fbshipit-source-id: 1211d40

infer/tests/build_systems/reactive/Makefile

@@ -22,7 +22,7 @@ include $(TESTS_DIR)/clang.make
 
 infer-out/report.json: $(CLANG_DEPS) $(SOURCES) $(HEADERS)
 	$(call silent_on_success,\
-	  $(INFER_BIN) $(INFER_OPTIONS) -a capture --reactive --continue -- \
+	  $(INFER_BIN) $(INFER_OPTIONS) -a capture -- \
 	    clang $(CLANG_OPTIONS) $(SOURCES1))
 	$(call silent_on_success,\
 	  $(INFER_BIN) $(INFER_OPTIONS) -a capture --reactive --continue -- \