Skip test_sendfile_close_peer_in_the_middle_of_receiving on ppc64le

Reported upstream https://github.com/python/cpython/issues/123384
Which was a duplicate of https://github.com/python/cpython/issues/120226

The test is fixed on the main branch, but skipping is easier than backporting.

The failure occurs with Kernel 6.10.x even when Python is built with an older Kernel.
By skipping the tests, we can ship a CVE fix.

python3.13.spec

@@ -1334,6 +1334,8 @@ CheckPython() {
   # test_signal is skipped due to https://github.com/python/cpython/issues/118989
   # test.test_concurrent_futures.test_deadlock tends to time out on s390x in
   # freethreading{,-debug} build, skipping it to shorten the build time
+  # test_sendfile_close_peer_in_the_middle_of_receiving:
+  #  https://github.com/python/cpython/issues/120226
   LD_LIBRARY_PATH=$ConfDir $ConfDir/python -m test.regrtest \
     -wW --slowest %{_smp_mflags} --timeout=2700 \
     -i test_freeze_simple_script \
@@ -1346,6 +1348,9 @@ CheckPython() {
     -x test_signal \
     -i test_deadlock \
     %endif
+    %ifarch ppc64le
+    -i test_sendfile_close_peer_in_the_middle_of_receiving \
+    %endif
 
   echo FINISHED: CHECKING OF PYTHON FOR CONFIGURATION: $ConfName