Fix libsvn detection for some Linux distros Distros like Debian/Ubuntu use architecture-specific directory structures (like /usr/lib/x86_64-linux-gnu) which we cannot hardcode/guess, so we really need to search the default paths.
Fix libsvn detection for some Linux distros
Distros like Debian/Ubuntu use architecture-specific directory structures
(like /usr/lib/x86_64-linux-gnu) which we cannot hardcode/guess, so we
really need to search the default paths.

slowriot/simgear,slowriot/simgear