Fix: Remove sun and android.os packages from Import-Package header of… (msgpack#958)

Fix: Remove sun and android.os packages from Import-Package header of MANIFEST.MF

Author: spp4keba

build.sbt

@@ -125,6 +125,11 @@ lazy val msgpackCore = Project(id = "msgpack-core", base = file("msgpack-core"))
         "org.msgpack.value",
         "org.msgpack.value.impl"
       ),
+	OsgiKeys.importPackage :=
+	  Seq(
+        "!android.os",
+        "!sun.*"
+      ),
     testFrameworks += new TestFramework("wvlet.airspec.Framework"),
     Test / javaOptions ++=
       Seq(