fuchsia: Update local-sdk.py for recent gen.py changes

Bug: 707030
Change-Id: Ia61eecb9197af4040250980d8de20978b6b5739a
Reviewed-on: https://chromium-review.googlesource.com/902923Reviewed-by: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#534526}

tools/fuchsia/local-sdk.py

@@ -34,7 +34,8 @@ def EnsureEmptyDir(path):
 def BuildForArch(project, arch):
   Run('scripts/build-zircon.sh', '-p', project)
   Run('build/gn/gen.py', '--target_cpu=' + arch,
-      '--packages=garnet/packages/sdk','--ignore-skia', '--release')
+      '--packages=garnet/packages/sdk', '--release',
+      '--args=bootfs_packages=true')
   Run('buildtools/ninja', '-C', 'out/release-' + arch)