[skotty,sksg] Initial image support

TBR=
Change-Id: Ib3c918b1d746e4f190ae05708681f2d5519afdb2
Reviewed-on: https://skia-review.googlesource.com/91980
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>
diff --git a/BUILD.gn b/BUILD.gn
index 4a1433f..0dee148 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1379,6 +1379,7 @@
       "experimental/sksg/SkSGEffectNode.cpp",
       "experimental/sksg/SkSGGeometryNode.cpp",
       "experimental/sksg/SkSGGroup.cpp",
+      "experimental/sksg/SkSGImage.cpp",
       "experimental/sksg/SkSGInvalidationController.cpp",
       "experimental/sksg/SkSGNode.cpp",
       "experimental/sksg/SkSGPaintNode.cpp",