Skip test suite on aarch64

(https://bugzilla.redhat.com/show_bug.cgi?id=1833346)

nbdkit.spec

@@ -19,6 +19,13 @@
 # often broken on non-x86_64 arches.
 %global complete_test_arches x86_64
 
+# If the test suite is broken on a particular architecture, document
+# it as a bug and add it to this list.
+#
+# aarch64: https://bugzilla.redhat.com/show_bug.cgi?id=1833346
+#global broken_test_arches NONE
+%global broken_test_arches aarch64
+
 %if 0%{?rhel} == 7
 # On RHEL 7, nothing in the virt stack is shipped on aarch64 and
 # libguestfs was not shipped on POWER (fixed in 7.5).  We could in
@@ -647,6 +654,7 @@ rm $RPM_BUILD_ROOT%{_mandir}/man1/nbdkit-ext2-plugin.1*
 
 
 %check
+%ifnarch %{broken_test_arches}
 # Workaround for broken libvirt (RHBZ#1138604).
 mkdir -p $HOME/.cache/libvirt
 
@@ -672,6 +680,7 @@ make %{?_smp_mflags} check || {
     cat tests/test-suite.log
     exit 1
   }
+%endif
 
 
 %if 0%{?have_ocaml}