The Ubuntu build says to do this, so I'll believe it so it stops failing.

We get rid of the exports file with ws_symbol_export.h, and then we
bring it back with this.

Change-Id: Ic689d20ec8ca5806677e1b52018c8c79b381508f
Reviewed-on: https://code.wireshark.org/review/4335
Reviewed-by: Guy Harris <guy@alum.mit.edu>