bpo-37077: Add native thread ID (TID) for AIX (GH-13624)


This is the followup  for issue36084

https://bugs.python.org/issue37077
(cherry picked from commit d0eeb936d8daf05d7d89f6935e3f4c0dee49c5be)

Co-authored-by: Michael Felt <aixtools@users.noreply.github.com>
diff --git a/Doc/library/_thread.rst b/Doc/library/_thread.rst
index 5b4fcde..bd653ab 100644
--- a/Doc/library/_thread.rst
+++ b/Doc/library/_thread.rst
@@ -106,7 +106,7 @@
    Its value may be used to uniquely identify this particular thread system-wide
    (until the thread terminates, after which the value may be recycled by the OS).
 
-   .. availability:: Windows, FreeBSD, Linux, macOS, OpenBSD, NetBSD.
+   .. availability:: Windows, FreeBSD, Linux, macOS, OpenBSD, NetBSD, AIX.
 
    .. versionadded:: 3.8
 
diff --git a/Doc/library/threading.rst b/Doc/library/threading.rst
index b4f4814..2907b65 100644
--- a/Doc/library/threading.rst
+++ b/Doc/library/threading.rst
@@ -82,7 +82,7 @@
    Its value may be used to uniquely identify this particular thread system-wide
    (until the thread terminates, after which the value may be recycled by the OS).
 
-   .. availability:: Windows, FreeBSD, Linux, macOS, OpenBSD, NetBSD.
+   .. availability:: Windows, FreeBSD, Linux, macOS, OpenBSD, NetBSD, AIX.
 
    .. versionadded:: 3.8