Fix more absl tempdir usage in Regalloc trace worker test

There are a couple more instances here where we need to call full_path
on absl _Tempdir instances.

Author: boomanaiden154

compiler_opt/es/regalloc_trace/regalloc_trace_worker_test.py

@@ -68,7 +68,7 @@ def setUp(self):
 
   def test_build_corpus_and_evaluate(self):
     corpus_dir = self.create_tempdir("corpus")
-    corpus_modules = _setup_corpus(corpus_dir)
+    corpus_modules = _setup_corpus(corpus_dir.full_path)
     fake_clang_binary = self.create_tempfile("fake_clang")
     fake_clang_invocations = self.create_tempfile("fake_clang_invocations")
     _create_test_binary(fake_clang_binary.full_path,
@@ -117,7 +117,7 @@ def test_build_corpus_and_evaluate(self):
 
   def test_compile_corpus_and_evaluate_with_tflite(self):
     corpus_dir = self.create_tempdir("corpus")
-    corpus_modules = _setup_corpus(corpus_dir)
+    corpus_modules = _setup_corpus(corpus_dir.full_path)
     fake_clang_binary = self.create_tempfile("fake_clang")
     fake_clang_invocations = self.create_tempfile("fake_clang_invocations")
     _create_test_binary(fake_clang_binary.full_path,