Upstream status: Not upstreamed.

The build system refuses to cross-compile for unknown targets
even though it works fine.  Add GNU/Hurd target.

--- Python-3.8.5/configure.orig	2020-10-26 14:06:09.665423525 +0100
+++ Python-3.8.5/configure	2020-10-26 14:08:30.987765738 +0100
@@ -3278,6 +3278,9 @@
 	*-*-vxworks*)
 	    ac_sys_system=VxWorks
 	    ;;
+	*-*-gnu)
+	    ac_sys_system=GNU
+	    ;;
 	*)
 		# for now, limit cross builds to known configurations
 		MACHDEP="unknown"
@@ -3328,6 +3331,9 @@
 	*-*-vxworks*)
 		_host_cpu=$host_cpu
 		;;
+	*-*-gnu)
+		_host_cpu=$host_cpu
+	    ;;
 	*)
 		# for now, limit cross builds to known configurations
 		MACHDEP="unknown"
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<tr><td><span title='2023-12-03 11:51:17 +0100'>2023-12-03</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=2c9ac9ab20c76abe570ff83f8746fa089fea3047'>gnu: mes: Update to 0.26.</a><span class='msg-avail'>...</span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2023-12-02 09:15:50 +0100'>2023-12-02</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=ea348b105d1fb8f02b3ca8665c5ad33928f7483f'>gnu: mes: Update to 0.25.1.</a><span class='msg-avail'>...</span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2023-12-02 09:15:50 +0100'>2023-12-02</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=a84bb5e60033c3b38ef88786ace79e49df848483'>gnu: mescc-tools: Update to 1.5.2.</a><span class='msg-avail'>...</span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2023-11-11 07:34:57 +0100'>2023-11-11</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=61c527227ceebdad8da2d52214b253a48323cbb9'>gnu: Remove m2-planet-1.9.0.</a><span class='msg-avail'>...</span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2023-11-11 07:34:57 +0100'>2023-11-11</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=552e15792b085d7eaba0a90bc0f178dcf44f2185'>gnu: mes: Update to 0.25.</a><span class='msg-avail'>...</span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2023-11-11 07:34:54 +0100'>2023-11-11</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=952d0951da3bc272ac6753631ddc1bd6ee38f03d'>gnu: mescc-tools: Support riscv64-linux build.</a><span class='msg-avail'>...</span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2023-11-07 16:42:32 +0100'>2023-11-07</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=c7408f50d170d2c25480dd4aa207de884955cf81'>gnu: mes: Use m2-planet-1.9.0.</a><span class='msg-avail'>...</span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2023-11-07 16:36:46 +0100'>2023-11-07</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=009621092b4b332451d36d0232c3cf673f6d5e9f'>gnu: Add m2-planet-1.9.0</a><span class='msg-avail'>...</span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2023-11-05 11:00:16 +0100'>2023-11-05</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=7684214b3d8d1b0abd3c35f3652c46f10d290574'>gnu: m2-planet: Update to 1.11.0.</a><span class='msg-avail'>...</span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2023-11-05 10:59:40 +0100'>2023-11-05</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=09feb16a0c57c7cf22323c7251c57796f9461a44'>gnu: mescc-tools: Update to 1.5.0.</a><span class='msg-avail'>...</span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2023-09-17 16:22:03 -0400'>2023-09-17</span></td><td><a href='/guix/commit/gnu/packages/mes.scm?id=a6170fcd2ba1b4b677399f048bdcd7a5701775af'>gnu: Remove extraneous imports.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>