perl: update 5.38.2 -> 5.40.0

Update rdepends generator to account for new version specifiers
(v{version} instead of just {version}) and exclude a few more
external modules detected at runtime.

Adjust musl configuration to set custom LC_ALL handling
(musl doesn't follow glibc in that, see the last few comments here:
https://github.com/Perl/perl5/issues/22375 ).

Adjust ptest packaging to add a dummy Makefile for 'make perl
releases' test (otherwise the packaging specifically excludes makefiles).

(From OE-Core rev: 1c1cfae53564c836555ace926295cf88109b8c9f)

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/perl/files/perl-configpm-switch.patch

@@ -1,4 +1,4 @@
-From c25d460a2f00e9af25087d40447fe1a81c89710c Mon Sep 17 00:00:00 2001
+From 7a48538a7e8614a3342151b646d2105c0cb0cdd9 Mon Sep 17 00:00:00 2001
 From: Alexander Kanavin <alex.kanavin@gmail.com>
 Date: Sun, 27 May 2007 21:04:11 +0000
 Subject: [PATCH] perl: 5.8.7 -> 5.8.8 (from OE)
@@ -14,7 +14,6 @@ values would be valid for the host only.
 
 Upstream-Status: Inappropriate [native]
 Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
-
 ---
  configpm | 18 ++++++++++++++++--
  1 file changed, 16 insertions(+), 2 deletions(-)