android: Add host name to the list of items we dump to the event log at startup. It should help volunteers determine which device is which when matching it up to a project's website.

client/client_state.cpp

@@ -158,6 +158,10 @@ CLIENT_STATE::CLIENT_STATE()
 void CLIENT_STATE::show_host_info() {
     char buf[256], buf2[256];
 
+    msg_printf(NULL, MSG_INFO,
+        "Host name: %s",
+        host_info.domain_name
+    );
     nbytes_to_string(host_info.m_cache, 0, buf, sizeof(buf));
     msg_printf(NULL, MSG_INFO,
         "Processor: %d %s %s",