xdrgen: Make the xdrgen script location-independent

The @pythondir@ placeholder is meant for build-time substitution,
such as with autoconf. autoconf is not used in the kernel. Let's
replace that mechanism with one that better enables the xdrgen
script to be run from any directory.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2025-10-27 09:56:32 -04:00
commit 3bd937b49a