Configure: Fix ordering bug when processing split DEPENDs

Configure: Fix ordering bug when processing split DEPENDs

Configure was recently made to process this sort of line:

    DEPEND[generated]=util/perl|OpenSSL/something.pm

Unfortunately, in processing such lines, the order in which paths
were recomputed caused some resulting paths to be faulty under some
circumstances.  This change fixes that.

Fixes #22853

Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/23500)