util: fix compile error on debian

Add virnetdev.h,virnetdevbridge.h,virnetdevtap.h to private symbols,
since debian linker no longer allows transitive link resolution
Signed-off-by: NEli Qiao <taget@linux.vnet.ibm.com>

AUTHORS

@@ -203,6 +203,7 @@ Patches have also been contributed by:
   Josh Durgin          <josh.durgin@dreamhost.com>
   Wen Ruo Lv           <lvroyce@linux.vnet.ibm.com>
   Patrice LACHANCE     <patlachance@gmail.com>
+  Eli Qiao             <taget@linux.vnet.ibm.com>
 
   [....send patches to get your name here....]
 

src/libvirt_private.syms

@@ -1195,6 +1195,35 @@ virFileRewrite;
 # virnetclient.h
 virNetClientHasPassFD;
 
+# virnetdev.h
+virNetDevClearIPv4Address;
+virNetDevExists;
+virNetDevGetMAC;
+virNetDevGetMTU;
+virNetDevIsOnline;
+virNetDevSetIPv4Address;
+virNetDevSetMAC;
+virNetDevSetMTU;
+virNetDevSetMTUFromDevice;
+virNetDevSetOnline;
+
+
+# virnetdevbridge.h
+virNetDevBridgeAddPort;
+virNetDevBridgeCreate;
+virNetDevBridgeDelete;
+virNetDevBridgeGetSTP;
+virNetDevBridgeGetSTPDelay;
+virNetDevBridgeRemovePort;
+virNetDevBridgeSetSTP;
+virNetDevBridgeSetSTPDelay;
+
+
+# virnetdevtap.h
+virNetDevTapCreate;
+virNetDevTapCreateInBridgePort;
+virNetDevTapDelete;
+
 
 # virnetmessage.h
 virNetMessageClear;