Pull corpus_trigger to directory unique to each testcase.

Test: HAL Fuzzing Test
Bug: 64022625
Change-Id: I331eed775e2d1b18c4edf3e42a50702147b50af0
diff --git a/template/libfuzzer_test/libfuzzer_test.py b/template/libfuzzer_test/libfuzzer_test.py
index 239b2f1..d72f346 100644
--- a/template/libfuzzer_test/libfuzzer_test.py
+++ b/template/libfuzzer_test/libfuzzer_test.py
@@ -190,6 +190,15 @@
         except adb.AdbError as e:
             logging.exception(e)
 
+        corpus_trigger_dir = os.path.join(self._temp_dir,
+                                   test_case.GetCorpusTriggerDir())
+        os.makedirs(corpus_trigger_dir)
+        try:
+            self._dut.adb.pull(config.FUZZER_TEST_CRASH_REPORT, corpus_trigger_dir)
+        except adb.AdbError as e:
+            logging.exception(e)
+            logging.error('crash report was not created during test run.')
+
         try:
             self._dut.adb.pull(test_case.GetCorpusOutDir(), self._temp_dir)
             self.AnalyzeGeneratedCorpus(test_case)
@@ -198,12 +207,6 @@
         except adb.AdbError as e:
             logging.exception(e)
 
-        try:
-            self._dut.adb.pull(config.FUZZER_TEST_CRASH_REPORT, self._temp_dir)
-        except adb.AdbError as e:
-            logging.exception(e)
-            logging.error('crash report was not created during test run.')
-
         self.EvaluateTestcase(test_case, result, inuse_seed)
         self.AssertTestResult(test_case, result)
 
diff --git a/template/libfuzzer_test/libfuzzer_test_case.py b/template/libfuzzer_test/libfuzzer_test_case.py
index dd45001..13dd903 100644
--- a/template/libfuzzer_test/libfuzzer_test_case.py
+++ b/template/libfuzzer_test/libfuzzer_test_case.py
@@ -53,6 +53,10 @@
         """Returns corpus seed directory name on target."""
         return self._GetCorpusDir() + '_seed'
 
+    def GetCorpusTriggerDir(self):
+        """Returns basename of corpus trigger directory."""
+        return '%s_corpus_trigger' % self._test_name
+
     def CreateFuzzerFlags(self):
         """Creates flags for the fuzzer executable.