Are you using the command "find" to search for those files or are you using "locate"? Locate will only find new files after the database has been updated with "updatedb" Also those files should be extracted in the same directory as your svgalib.tar.gz,so just copy the lib directory into your lib path which is usually "/usr/lib","/lib" or "/usr/local/lib".Also I think you might need libc.5.so to run quake if I remember right,this is mentioned at
http://www.svgalib.org.You can also grab and compile the source from there too,if you have problems running the binary.
DL