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 69dc9f5..c8c63f1 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -225,6 +225,7 @@
 Daniel Calvelo
 Tony Campbell
 Brett Cannon
+Tristan Carel
 Mike Carlton
 Pierre Carrier
 Terry Carroll
@@ -573,6 +574,7 @@
 Larry Hastings
 Tim Hatch
 Shane Hathaway
+Michael Haubenwallner
 Janko Hauser
 Rycharde Hawkes
 Ben Hayden
diff --git a/Misc/NEWS b/Misc/NEWS
index 7c6c158..07576b5 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -555,6 +555,9 @@
 Build
 -----
 
+- Issue #10656: Fix out-of-tree building on AIX.  Patch by Tristan Carel and
+  Michael Haubenwallner.
+
 - Issue #26359: Rename --with-optimiations to --enable-optimizations.
 
 - Issue #28444: Fix missing extensions modules when cross compiling.