gnu: qemu: Disable failing migration-test on AArch64.

On some AArch64 devices, like RPi5 or honeycombs used by CI, the test fails.

* gnu/packages/patches/qemu-disable-aarch64-migration-test.patch: New file.
* gnu/packages/virtualization.scm (qemu): Patch it.
* gnu/local.mk (dist_patch_DATA): Register it.

Change-Id: Ica2d31bc53e154637036c13517289c6c78010739
Fixes: #2447
Signed-off-by: Rutherther <rutherther@ditigal.xyz>
Merges: #5683

gnu/local.mk

@@ -2210,6 +2210,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/qemu-glibc-2.30.patch 			\
   %D%/packages/patches/qemu-fix-agent-paths.patch 		\
   %D%/packages/patches/qemu-fix-test-virtio-version.patch       \
+  %D%/packages/patches/qemu-disable-aarch64-migration-test.patch	\
   %D%/packages/patches/qrcodegen-cpp-cmake.patch		\
   %D%/packages/patches/qtbase-absolute-runpath.patch		\
   %D%/packages/patches/qtbase-qmake-fix-includedir.patch 	\

gnu/packages/patches/qemu-disable-aarch64-migration-test.patch

@@ -0,0 +1,24 @@
+This patch disables the 'migration-test' on AArch64, as it fails on some
+devices like this:
+
+stderr:
+qemu-system-aarch64: KVM does not support GICv3 emulation
+Broken pipe
+../../tests/qtest/libqtest.c:200: kill_qemu() tried to terminate QEMU process but encountered exit status 1 (expected 0)
+
+(test program exited with status code -6)
+
+TAP parsing error: Too few tests run (expected 61, got 0)
+
+--- a/tests/qtest/meson.build     2026-01-16 21:53:16.945167915 +0100
++++ b/tests/qtest/meson.build 2026-01-16 21:52:55.313191080 +0100
+@@ -266,8 +266,7 @@
+   qtests_cxl +                                                                                  \
+   ['arm-cpu-features',
+    'numa-test',
+-   'boot-serial-test',
+-   'migration-test']
++   'boot-serial-test']
+ 
+ qtests_s390x = \
+   qtests_filter + \

gnu/packages/virtualization.scm

@@ -402,6 +402,14 @@
                       ;; failed to allocate memory for stack: Cannot allocate memory
                       (substitute* "tests/qtest/meson.build"
                         ((".*qtests_aspeed :.*") ""))))))
+              ((target-aarch64?)
+               #~((add-after 'unpack 'disable-some-tests
+                    (lambda _
+                      ;; fails on some devices with GICv3 emulation not supported.
+                      (let ((patch #$(local-file
+                                      (search-patch
+                                       "qemu-disable-aarch64-migration-test.patch"))))
+                        (invoke "patch" "--force" "-p1" "-i" patch))))))
               (else '()))
           (add-after 'patch-source-shebangs 'patch-embedded-shebangs
             (lambda* (#:key native-inputs inputs #:allow-other-keys)