add travis-pecl submodule

[m6w6/ext-pq] / travis / pecl

diff --git a/travis/pecl b/travis/pecl
new file mode 160000 (submodule)
index 0000000..3f32c9f
--- /dev/null
+++ b/travis/pecl
@@ -0,0 +1 @@
+Subproject commit 3f32c9f45f15e329d1751cdb58cd411a3a5adfcd