update travis-pecl

diff --git a/travis/pecl b/travis/pecl
index b2b55407068832287e9e96dba9e9fc8c1696954c..0815aa6d8727870e6bf8409700925abfaaf2b723 160000 (submodule)
--- a/travis/pecl
+++ b/travis/pecl
@@ -1 +1 @@
-Subproject commit b2b55407068832287e9e96dba9e9fc8c1696954c
+Subproject commit 0815aa6d8727870e6bf8409700925abfaaf2b723