update travis-pecl

diff --git a/travis/pecl b/travis/pecl
index 9800c7bbe07c9c8a172b158b58c85ce4a97d3863..b2b55407068832287e9e96dba9e9fc8c1696954c 160000 (submodule)
--- a/travis/pecl
+++ b/travis/pecl
@@ -1 +1 @@
-Subproject commit 9800c7bbe07c9c8a172b158b58c85ce4a97d3863
+Subproject commit b2b55407068832287e9e96dba9e9fc8c1696954c