update travis/pecl

diff --git a/travis/pecl b/travis/pecl
index 54a746ab5e068060f53796d0aca55f76656bb8b1..4508f562f8ef3c07b4490bef0e7563e73ef9a5f0 160000 (submodule)
--- a/travis/pecl
+++ b/travis/pecl
@@ -1 +1 @@
-Subproject commit 54a746ab5e068060f53796d0aca55f76656bb8b1
+Subproject commit 4508f562f8ef3c07b4490bef0e7563e73ef9a5f0