Share the platform-neutral Rust mobile contract (#91)

apple/Generated/ironstorage_mobileFFI.modulemap

@@ -0,0 +1,7 @@
+module ironstorage_mobileFFI {
+    header "ironstorage_mobileFFI.h"
+    export *
+    use "Darwin"
+    use "_Builtin_stdbool"
+    use "_Builtin_stdint"
+}