Issue #10656: Fix out-of-tree building on AIX

The ld_so_aix script and python.exp file are created in the build directory.
Patch by Tristan Carel and Michael Haubenwallner.
diff --git a/Misc/ACKS b/Misc/ACKS
index 65fd0dc..9cbc230 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -209,6 +209,7 @@
 Daniel Calvelo
 Tony Campbell
 Brett Cannon
+Tristan Carel
 Mike Carlton
 Pierre Carrier
 Terry Carroll
@@ -541,6 +542,7 @@
 Larry Hastings
 Tim Hatch
 Shane Hathaway
+Michael Haubenwallner
 Janko Hauser
 Rycharde Hawkes
 Ben Hayden