Fix Android build warnings

runtime/bin/directory_android.cc

Index: runtime/bin/directory_android.cc
diff --git a/runtime/bin/directory_android.cc b/runtime/bin/directory_android.cc
index bb190b2b4ca8374d03bdd2d76afc09c9cb43289b..95f42da62baee6bd925ece63f815ff0b676d82e8 100644
--- a/runtime/bin/directory_android.cc
+++ b/runtime/bin/directory_android.cc
@@ -82,8 +82,8 @@ void PathBuffer::Reset(intptr_t new_length) {
 // A linked list of symbolic links, with their unique file system identifiers.
 // These are scanned to detect loops while doing a recursive directory listing.
 struct LinkList {
-  dev_t dev;
-  ino_t ino;
+  uint64_t dev;
+  uint64_t ino;
   LinkList* next;
 };