add drawImage to lua

git-svn-id: http://skia.googlecode.com/svn/trunk@9500 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleLua.cpp b/samplecode/SampleLua.cpp
index 104a427..00a3227 100644
--- a/samplecode/SampleLua.cpp
+++ b/samplecode/SampleLua.cpp
@@ -27,6 +27,8 @@
     "local paint = Sk.newPaint();"
     "paint:setAntiAlias(true);"
     ""
+    "local image = Sk.loadImage('/skia/trunk/sailboat.jpg');"
+    ""
     "local color = {a = 1, r = 1, g = 0, b = 0};"
     ""
     "function rnd(range) "
@@ -76,6 +78,7 @@
     "   canvas:translate(x, 0);"
     "   canvas:drawOval(r, paint) "
     "   x = x + 1;"
+    "   canvas:drawImage(image, x, r.bottom + 50, 0.5);"
     "   if x > 100 then x = 0 end;"
     "end "
     ""