tests: erasure-code non regression tests must skip isa on i386

When the isa plugin is not present, the isa plugin payloads are not
tested. When that happens, remember that it was intentional by storing
the path that would have been tested so that the inventory is complete.

http://tracker.ceph.com/issues/11949 Fixes: #11949

Signed-off-by: Loic Dachary <loic@dachary.org>

diff --git a/ceph-erasure-code-corpus b/ceph-erasure-code-corpus
index fe76544beb0d87ee4a2b167a16433cae900b8399..4957a9a0fb0af6ff992ed6955257279281d99bc0 160000 (submodule)
--- a/ceph-erasure-code-corpus
+++ b/ceph-erasure-code-corpus
@@ -1 +1 @@
-Subproject commit fe76544beb0d87ee4a2b167a16433cae900b8399
+Subproject commit 4957a9a0fb0af6ff992ed6955257279281d99bc0