Use @autoreleasepool directive

[pithos-macos] / pithos-apple-common

diff --git a/pithos-apple-common b/pithos-apple-common
index 7ac1bf1..cc176fe 160000 (submodule)
--- a/pithos-apple-common
+++ b/pithos-apple-common
@@ -1 +1 @@
-Subproject commit 7ac1bf11f8e6267e6146230f2dce93765542bf05
+Subproject commit cc176feb28e66fac71ccdcfffa96b86b2855de68