Fix hardcoded lib/ dir, for building on x86_64.
Fix hardcoded lib/ dir, for building on x86_64.

While detection method leaves something to be desired it is what is used
by other autoconf files found in the wild.

glawler/watcher-visualization,glawler/watcher-visualization,glawler/watcher-visualization,glawler/watcher-visualization,glawler/watcher-visualization