Revise how prefix, datadir etc. are handled.

With these changes, we are a bit closer to how autoconf works, the
de-facto standard for configure scripts. The changes make it easier
for packagers to modify where ScummVM install things (e.g. the
Maemo port might benefit from this). It is now also trivial to
override certain paths when invoking make, e.g. you can now do
  make install prefix=/opt
and also datadir, mandir etc. will reflect the change.

svn-id: r48989

0 files changed, 0 insertions, 0 deletions