BSD/OS does not like shared libraries without a symbol table and gives errors
when linking against libavcodec.so otherwise.
patch by Steven M. Schultz < sms == at == 2BSD == dot == COM >


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@4722 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b