Reland "Add SVG to default modules list"

This is a reland of 579728eb1941251b8d21299535dc98c86f452a11

Original change's description:
> Add SVG to default modules list
>
> This enables SVG to build in official builds.
>
> Change-Id: I4f64109983216baf9663061e23cc3757292ff448
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/386096
> Reviewed-by: Florin Malita <fmalita@google.com>
> Commit-Queue: Tyler Denniston <tdenniston@google.com>

Change-Id: I8bb93f3881e69f7b4461981a4f0f95a87fed0976
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/386557
Reviewed-by: Florin Malita <fmalita@google.com>
Commit-Queue: Tyler Denniston <tdenniston@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index 688e1e3..0e7985f 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1497,6 +1497,7 @@
     "modules/skottie",
     "modules/skparagraph",
     "modules/skshaper",
+    "modules/svg",
   ]
 }