Add some SkPath lua functions

tools/lua/dump_clipstack_at_restore.lua

Index: tools/lua/dump_clipstack_at_restore.lua
diff --git a/tools/lua/dump_clipstack_at_restore.lua b/tools/lua/dump_clipstack_at_restore.lua
index d53f5a3712b924acd3ca49b7b5faefa7fb604728..4691b5b250720fd6c906b3b9958cda7c14d3d8e9 100644
--- a/tools/lua/dump_clipstack_at_restore.lua
+++ b/tools/lua/dump_clipstack_at_restore.lua
@@ -14,7 +14,13 @@ function sk_scrape_accumulate(t)
         io.write("Clip Stack at restore #", restoreCount, ":\n")
         for i = 1, #clipstack do
             local element = clipstack[i];
-            io.write("\t", element["op"], ", ", element["type"], ", aa:", tostring(element["aa"]), "\n")
+            io.write("\t", element["op"], ", ", element["type"], ", aa:", tostring(element["aa"]))
+            if (element["type"] == "path") then
+                io.write(", fill: ", element["path"]:getFillType())
+                io.write(", segments: \"", element["path"]:getSegmentTypes(), "\"")
+                io.write(", convex:", tostring(element["path"]:isConvex()))
+            end
+            io.write("\n")
         end
         io.write("\n")
     else