Add patheffects to debugger printout

src/effects/SkDiscretePathEffect.cpp

Index: src/effects/SkDiscretePathEffect.cpp
diff --git a/src/effects/SkDiscretePathEffect.cpp b/src/effects/SkDiscretePathEffect.cpp
index 6765b296a54b9b6c7306860cb18c16ba1aad21a9..ac84a600e3ddb0726916a8bf16dafeac82dd6599 100644
--- a/src/effects/SkDiscretePathEffect.cpp
+++ b/src/effects/SkDiscretePathEffect.cpp
@@ -128,3 +128,11 @@ void SkDiscretePathEffect::flatten(SkWriteBuffer& buffer) const {
     buffer.writeScalar(fPerterb);
     buffer.writeUInt(fSeedAssist);
 }
+
+#ifndef SK_IGNORE_TO_STRING
+void SkDiscretePathEffect::toString(SkString* str) const {
+    str->appendf("SkDiscretePathEffect: (");
+    str->appendf("segLength: %.2f deviation: %.2f seed %d", fSegLength, fPerterb, fSeedAssist);
+    str->append(")");
+}
+#endif