add aarch64 to allowed platforms

tests/test_common_utils.sh

@@ -86,8 +86,11 @@ actual="$(set -e; suppress bad_mid_cmd)"
 # Reset options
 set_opts $ORIG_OPTS
 
-# On Linux docker containers in travis, can only be x86_64 or i686
-[ "$(get_platform)" == x86_64 ] || [ "$(get_platform)" == i686 ] || exit 1
+# On Linux docker containers in travis, can be x86_64, i686, or aarch64
+[ "$(get_platform)" == x86_64 ] || \
+    [ "$(get_platform)" == i686 ] || \
+    [ "$(get_platform)" == aarch64 ] || \
+    exit 1
 
 # Crudest possible check for get_distutils_platform
 expected=$(python -c "import distutils.util as du; print(du.get_platform())")