Fix visibility for skylarkbuildapi from last submission.  This is used
externally by Copybara so needs to be visibility:public.
RELNOTES: None.
@@ -12,6 +12,7 @@ filegroup(
java_library(
name = "skylarkinterface",
exported_plugins = ["//src/main/java/com/google/devtools/build/lib/skylarkinterface/processor:annotation_preprocessor"],
+ visibility = ["//visibility:public"],
exports = [":annotations"],
)
