tests: use git__ allocator functions consistently

Author: ethomson

tests/libgit2/checkout/conflict.c

@@ -1095,7 +1095,7 @@ static void collect_progress(
 	if (path == NULL)
 		return;
 
-	git_vector_insert(paths, strdup(path));
+	git_vector_insert(paths, git__strdup(path));
 }
 
 void test_checkout_conflict__report_progress(void)

tests/libgit2/checkout/icase.c

@@ -89,7 +89,7 @@ static void assert_name_is(const char *expected)
 	if (start)
 		cl_assert_equal_strn("/", actual + (start - 1), 1);
 
-	free(actual);
+	git__free(actual);
 }
 
 static int symlink_or_fake(git_repository *repo, const char *a, const char *b)

tests/libgit2/remote/fetch.c

@@ -40,10 +40,10 @@ void test_remote_fetch__cleanup(void) {
 	git_repository_free(repo2);
 
 	cl_git_pass(git_futils_rmdir_r(repo1_path, NULL, GIT_RMDIR_REMOVE_FILES));
-	free(repo1_path);
+	git__free(repo1_path);
 
 	cl_git_pass(git_futils_rmdir_r(repo2_path, NULL, GIT_RMDIR_REMOVE_FILES));
-	free(repo2_path);
+	git__free(repo2_path);
 }