Macro impl_calendar_islamicobservationalcache_v1

macro_rules! impl_calendar_islamicobservationalcache_v1 {
    ($ provider : ty) => { ... };
}

Implement DataProvider<IslamicObservationalCacheV1Marker> on the given struct using the data hardcoded in this file. This allows the struct to be used with icu’s _unstable constructors.