lstopo: swap lstopo.1 and lstopo-no-graphics.1 symlink

Match what we do for binaries. lstopo-no-graphics always
exist as a binary. lstopo may be just a symlink. So now
lstopo.1 is a symlink to lstopo-no-graphics.1

Thanks to Jirka Hladky for reporting the issue.

(cherry picked from commit 573ac8842b198a6cfe8c64f3946c216b8dafaa4a)