Track libcore.os' move to android.system.

(This is partial, but should cover everything in AOSP master except
for the zygote.)

Change-Id: I1042c99245765746a744c44e714095cb2c6cb75d
diff --git a/core/java/android/net/LinkAddress.java b/core/java/android/net/LinkAddress.java
index 22543e3..a725bec 100644
--- a/core/java/android/net/LinkAddress.java
+++ b/core/java/android/net/LinkAddress.java
@@ -24,13 +24,13 @@
 import java.net.InterfaceAddress;
 import java.net.UnknownHostException;
 
-import static libcore.io.OsConstants.IFA_F_DADFAILED;
-import static libcore.io.OsConstants.IFA_F_DEPRECATED;
-import static libcore.io.OsConstants.IFA_F_TENTATIVE;
-import static libcore.io.OsConstants.RT_SCOPE_HOST;
-import static libcore.io.OsConstants.RT_SCOPE_LINK;
-import static libcore.io.OsConstants.RT_SCOPE_SITE;
-import static libcore.io.OsConstants.RT_SCOPE_UNIVERSE;
+import static android.system.OsConstants.IFA_F_DADFAILED;
+import static android.system.OsConstants.IFA_F_DEPRECATED;
+import static android.system.OsConstants.IFA_F_TENTATIVE;
+import static android.system.OsConstants.RT_SCOPE_HOST;
+import static android.system.OsConstants.RT_SCOPE_LINK;
+import static android.system.OsConstants.RT_SCOPE_SITE;
+import static android.system.OsConstants.RT_SCOPE_UNIVERSE;
 
 /**
  * Identifies an IP address on a network link.