Fix memory leaks in diff rename tests

This fixes a couple objects I forgot to free, and also updates
the valgrind suppressions file on the Mac to cover a few more
cases that had crept in.

tests-clar/diff/rename.c

@@ -947,6 +947,7 @@ void test_diff_rename__case_changes_are_split(void)
 
 	git_diff_list_free(diff);
 	git_index_free(index);
+	git_tree_free(tree);
 }
 
 void test_diff_rename__unmodified_can_be_renamed(void)
@@ -993,4 +994,6 @@ void test_diff_rename__unmodified_can_be_renamed(void)
 	cl_assert_equal_i(1, exp.file_status[GIT_DELTA_RENAMED]);
 
 	git_diff_list_free(diff);
+	git_index_free(index);
+	git_tree_free(tree);
 }

tests-clar/valgrind-supp-mac.txt

@@ -113,24 +113,18 @@
 {
 	mac-ssl-leak-1
 	Memcheck:Leak
-	fun:malloc
-	fun:CRYPTO_malloc
 	...
 	fun:ERR_load_strings
 }
 {
 	mac-ssl-leak-2
 	Memcheck:Leak
-	fun:malloc
-	fun:CRYPTO_malloc
 	...
 	fun:SSL_library_init
 }
 {
 	mac-ssl-leak-3
 	Memcheck:Leak
-	fun:malloc
-	fun:strdup
 	...
 	fun:si_module_with_name
 	fun:getaddrinfo
@@ -144,6 +138,14 @@
 	fun:ssl3_get_server_certificate
 }
 {
+	mac-ssl-leak-5
+	Memcheck:Leak
+	fun:malloc
+	fun:CRYPTO_malloc
+	...
+	fun:ERR_put_error
+}
+{
 	clar-printf-buf
 	Memcheck:Leak
 	fun:malloc