Some paths set that are set at configure time are needed at run
time. These are exported by the Makefile. Change this to export the
"canonical", unversioned, ones. This also has the advantage, that
tools do not have to know which programs are python scripts (where,
after following all the symbolic links, you end up under
$(prefix)/share/ due to the private-module layout) and which are
binaries (where you end up under $(prefix)/lib/).

Signed-off-by: Klaus Aehlig <aehlig@google.com>
Reviewed-by: Michele Tartara <mtartara@google.com>