Fix a bug in ZoneCompactor that meant the zonetab offset was wrong.

Bug: 8391426
Change-Id: Ia4a8889b5a613aa96bb3fb5d89a921c913ff7626

libc/tools/zoneinfo/ZoneCompactor.java

@@ -198,6 +198,8 @@ public class ZoneCompactor {
     // Write the data.
     f.write(allData.toByteArray());
 
+    int zonetab_offset = (int) f.getFilePointer();
+
     // Copy the zone.tab.
     reader = new BufferedReader(new FileReader(zoneTabFile));
     while ((s = reader.readLine()) != null) {
@@ -208,8 +210,6 @@ public class ZoneCompactor {
     }
     reader.close();
 
-    int zonetab_offset = (int) f.getFilePointer();
-
     // Go back and fix up the offsets in the header.
     f.seek(index_offset_offset);
     f.writeInt(index_offset);