update travis/pecl

diff --git a/travis/pecl b/travis/pecl
index ae0733a44ac3e68871476841b7f01b8ad3d18629..23c2876aaa0808bcfedc1c5c30da6e8234341a13 160000 (submodule)
--- a/travis/pecl
+++ b/travis/pecl
@@ -1 +1 @@
-Subproject commit ae0733a44ac3e68871476841b7f01b8ad3d18629
+Subproject commit 23c2876aaa0808bcfedc1c5c30da6e8234341a13