[fuchsia] Updating local-sdk script configuration

This updates the local-sdk.py script to build the terminal product vs.
the core product.

This is done to align local-sdk configuration with the configuration
used when creating the prebuilt SDK images from Fuchsia.

Change-Id: Icda16c36e2f850bd2ab595cbb35edc128657fa95
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2418848Reviewed-by: Fabrice de Gans-Riberi <fdegans@chromium.org>
Commit-Queue: Fabrice de Gans-Riberi <fdegans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#808392}

tools/fuchsia/local-sdk.py

@@ -36,7 +36,7 @@ def EnsureEmptyDir(path):
 
 def BuildForArch(arch):
   build_dir = 'out/release-' + arch
-  Run('scripts/fx', '--dir', build_dir, 'set', 'core.qemu-' + arch,
+  Run('scripts/fx', '--dir', build_dir, 'set', 'terminal.qemu-' + arch,
       '--args=cache_package_labels+=["//sdk/bundles:tools"]',
       '--args=is_debug=false', '--args=build_sdk_archives=true')
   Run('scripts/fx', 'build', 'sdk', 'build/images')