[ConfigImpact] Add FP test due to anonymous class

Summary: An anonymous class name includes an index number, for example `AnonymousClass$2` represents that it is the 2nd anonymous class implemented in the `AnonymousClass` class.  Problem is that when we insert a new anonymous class, all index of anonymous class names below increase by one, which introduces incorrect comparison on reportdiff.

Reviewed By: ezgicicek

Differential Revision: D28568753

fbshipit-source-id: 2a6c576eb

infer/tests/build_systems/fb_differential_of_config_impact_report_java/Makefile

@@ -6,8 +6,9 @@
 # E2E test for differential of costs
 
 TESTS_DIR = ../..
-SOURCES = src/DiffExample.current.java src/DiffExample.previous.java
+SOURCES = src/DiffExample.current.java src/DiffExample.previous.java \
-COPIED = src/DiffExample.java
+  src/DiffAnonymousClass.current.java src/DiffAnonymousClass.previous.java
+COPIED = src/DiffExample.java src/DiffAnonymousClass.java
 CLEAN_EXTRA = $(COPIED) *.class
 DIFFERENTIAL_ARGS = --enable-issue-type CONFIG_IMPACT
 include $(TESTS_DIR)/differential-config-impact.make
@@ -17,12 +18,14 @@ $(CURRENT_REPORT) $(PREVIOUS_REPORT): $(JAVA_DEPS)
 
 $(CURRENT_REPORT):
 	$(QUIET)$(COPY) src/DiffExample.current.java src/DiffExample.java
+	$(QUIET)$(COPY) src/DiffAnonymousClass.current.java src/DiffAnonymousClass.java
 	$(QUIET)$(call silent_on_success,Testing Config Impact Differential: current,\
 	$(INFER_BIN) --no-filtering --config-impact-analysis-only --config-impact-data-file config_data.json -o $(CURRENT_DIR) \
 	  -- $(JAVAC) -cp $(CLASSPATH)  $(COPIED))
 
 $(PREVIOUS_REPORT):
 	$(QUIET)$(COPY) src/DiffExample.previous.java src/DiffExample.java
+	$(QUIET)$(COPY) src/DiffAnonymousClass.previous.java src/DiffAnonymousClass.java
 	$(QUIET)$(call silent_on_success,Testing Config Impact Differential: previous,\
 	$(INFER_BIN) --no-filtering --config-impact-analysis-only --config-impact-data-file config_data.json -o $(PREVIOUS_DIR) \
 	  -- $(JAVAC) -cp $(CLASSPATH) $(COPIED))