Disable GPU support by default when building for host in Fuchsia

When building Skia for host as part of Fuchsia build, we don't need
the GPU support which introduces additional dependency on X11.

Change-Id: I29a1a8a4b349c1c7d2e7db5c5c44a4cc8917cbdc
Reviewed-on: https://skia-review.googlesource.com/117381
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index e00e7fa..647bf5b 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -37,7 +37,7 @@
   skia_enable_effects = true
   skia_enable_flutter_defines = false
   skia_enable_fontmgr_empty = false
-  skia_enable_gpu = true
+  skia_enable_gpu = is_fuchsia || target_os != "fuchsia"
   skia_enable_pdf = true
   skia_enable_spirv_validation = is_skia_dev_build && is_debug
   skia_enable_tools = is_skia_dev_build
@@ -1693,7 +1693,7 @@
     deps = [
       ":flags",
       ":skia",
-      ":tool_utils"
+      ":tool_utils",
     ]
   }