feat(src/externals/single-application/SingleApplication): log SIGPIPE on GNU Linux

linphone-desktop/src/externals/single-application/SingleApplication.cpp

@@ -255,6 +255,10 @@ void SingleApplicationPrivate::connectToPrimary (int msecs, char connectionType)
     }
 
     cout << "[PROCESS ABNORMALLY TERMINATED]: " << signum << endl;
+    #ifdef Q_OS_LINUX
+      cout << "Please to remove your ~/.ICEauthority file and rerun." << endl;
+    #endif // ifdef Q_OS_UNIX
+
     ::exit(128 + signum);
   }