fix(dys): add 32-bit libcurl dependency (#5160)
Dystopia's server_srv.so links against 32-bit libcurl-gnutls.so.4, but the
dys dependency rows were empty, so the library failed to load and srcds
segfaulted on a NULL server factory. Add libcurl4-gnutls-dev:i386 on
Debian/Ubuntu and libcurl.i686 on the RHEL family, matching bb2 and tf2c.
Fixes #5159