Make adb's daemon-port on the host machine configurable.

This is the first CL of a somewhat larger effort which, among other things,
will involve changing the emulator and ddms to talk to adb running on a
configurable port.

The port can be configured using environment variable ANDROID_ADB_SERVER_PORT.

Further CLs will also address the set of ports used for the local transport.

Change-Id: Ib2f431801f0adcd9f2dd290a28005644a36a780a
diff --git a/adb/adb_client.h b/adb/adb_client.h
index 8061579..40ab189 100644
--- a/adb/adb_client.h
+++ b/adb/adb_client.h
@@ -25,6 +25,10 @@
 */
 void adb_set_transport(transport_type type, const char* serial);
 
+/* Set TCP specifics of the transport to use
+*/
+void adb_set_tcp_specifics(int server_port);
+
 /* Return the console port of the currently connected emulator (if any)
  * of -1 if there is no emulator, and -2 if there is more than one.
  * assumes adb_set_transport() was alled previously...